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I am looking for something like this to make my robot ideas as prototype. But I don't know it's name! Also if there are better options I will happy to know.

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  • $\begingroup$ For early stage prototypes, Lego Technic is a viable choice. $\endgroup$ – SF. Jun 19 '19 at 9:15
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What you're looking for is described as "Perforated", So a quick google for "Perforated Square Tubing Steel" produced: https://www.discountsteel.com/items/Galvanized_Steel_Perforated_Square_Tube.cfm

"80-20" is a brand name, and the product that @Donald Gibson was referring to can more generally be found called "T Slot Extrusion"

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  • $\begingroup$ That would be "T" slot, not "v" slot. $\endgroup$ – Donald Gibson Oct 17 '17 at 16:30
  • $\begingroup$ Edited accordingly - V slot is a slightly different form designed to work as a linear rail as well as a structural member, so T is the more general term $\endgroup$ – Jonathan R Swift Oct 18 '17 at 21:02
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Try 80-20 structural tubing. It is available is various sectional sizes, often used for robotics and machine framing.

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In addition to 80/20 you could use "unistrut" or "channel strut" framing which may be more readily available at a big box store.

unistrut

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