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Protobox

-15 Products

Protoboxes are an affordable bundle of high-quality materials perfect for testing your welding and fabrication skills, practicing on a new machine, having excess material for tinkering, or even adding to your latest art piece.

 

Every Protobox contains unique material profiles with each piece typically no larger than 6" x 12", giving you the chance to work with light, heavy, thick, and thin materials under the category of your choice, all at a very low cost.

Protoboxes are available in 5 lbs., 10 lbs., and 20 lbs. package options, in aluminum, brass, copper, carbon steel, and stainless steel.

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New Sizes for 303 Sheet/Plate

Onlinemetals is constantly expanding our selection of size, and now feature 303 in sizes 0.4375", 0.5625", 1.125" & 1.75".


Stainless Protobox 5lb. Part # 21930

Stainless Protobox 5lb. -
Part #: 21930

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$7.74
$7.74 ea.
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Carbon Steel Protobox 10lb. (Assorted Alloys) Part # 21890

Carbon Steel Protobox 10lb. (Assorted Alloys) -
Part #: 21890

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$11.90
$11.90 ea.
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Aluminum Shavings 5 Lb Part # 24891

Aluminum Shavings 5 Lb -
Part #: 24891

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$13.30
$13.30 ea.
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Aluminum Protobox 5lbs Part # 21886

Aluminum Protobox 5lbs -
Part #: 21886

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$14.64
$14.64 ea.
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Stainless Protobox 10lb. Part # 21931

Stainless Protobox 10lb. -
Part #: 21931

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$14.87
$14.87 ea.
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Key Features

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Brass Protobox 5lbs Part # 21883

Brass Protobox 5lbs -
Part #: 21883

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$17.17
$17.17 ea.
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Key Features

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Carbon Steel Protobox 20lb. (Assorted Alloys) Part # 21891

Carbon Steel Protobox 20lb. (Assorted Alloys) -
Part #: 21891

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$22.89
$22.89 ea.
Expand Details

Key Features

View more product details
Click for more details stainless-protobox-1superZoom

Aluminum Protobox 10lbs Part # 21887

Aluminum Protobox 10lbs -
Part #: 21887

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$29.30
$29.30 ea.
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Key Features

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Stainless Protobox 20lb. Part # 21932

Stainless Protobox 20lb. -
Part #: 21932

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$30.94
$30.94 ea.
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Key Features

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Copper Protobox 5 Lb Part # 21880

Copper Protobox 5 Lb -
Part #: 21880

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$32.05
$32.05 ea.
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Key Features

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Brass Protobox 10lbs Part # 21884

Brass Protobox 10lbs -
Part #: 21884

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$34.32
$34.32 ea.
Expand Details

Key Features

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Aluminum Protobox 20lbs Part # 21888

Aluminum Protobox 20lbs -
Part #: 21888

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$60.90
$60.90 ea.
Expand Details

Key Features

View more product details
Click for more details aluminum-protobox-1superZoom

Brass Protobox 20lbs Part # 21885

Brass Protobox 20lbs -
Part #: 21885

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$62.91
$62.91 ea.
Expand Details

Key Features

View more product details
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Copper Protobox 10 Lb Part # 21881

Copper Protobox 10 Lb -
Part #: 21881

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$64.05
$64.05 ea.
Expand Details

Key Features

View more product details
Click for more details copper-protobox-10lb-1superZoom

Copper Protobox 20 Lb Part # 21882

Copper Protobox 20 Lb -
Part #: 21882

Pack of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$128.13
$128.13 ea.
Expand Details

Key Features

View more product details
Click for more details copper-protobox-20lb-1superZoom

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