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Prototype, Test, Teach


Experiment with new materials by ordering Protoboxes or Sample Packs



Exclusively Providing 303 Sheet/Plate | Testing...


Onlinemetals is the only D2C metal supplier providing 303 sheet/plate in North America!


Carbon Steel Protobox 5lb. (Assorted Alloys) - 
Part #: 21889

Carbon Steel Protobox 5lb. (Assorted Alloys) -
Part #: 21889

QTY

$5.72 ea.

$5.72

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

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

QTY

$11.90 ea.

$11.90

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

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

QTY

$22.89 ea.

$22.89
Carbon Steel Protobox 5lb. (Assorted Alloys)
Carbon Steel Protobox 5lb. (Assorted Alloys) -
Part #: 21889
Pack of 1

$5.72

$5.72 ea.
Carbon Steel Protobox 10lb. (Assorted Alloys)
Carbon Steel Protobox 10lb. (Assorted Alloys) -
Part #: 21890
Pack of 1

$11.90

$11.90 ea.
Carbon Steel Protobox 20lb. (Assorted Alloys)
Carbon Steel Protobox 20lb. (Assorted Alloys) -
Part #: 21891
Pack of 1

$22.89

$22.89 ea.

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