O-rings

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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acs2997
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So I'm in the process of making the coolest pneumatic weapon of mass destruction ever seen, but I need to get some o-rings. Home-depot only had tiny ones. I'm looking to put it on the outside of a 1.25 in. coupler to make a piston for a 2 in. piston valve. Also, I need some that seal well on the outside of 1 in. pvc. Any recommendations/suggestions for where I should go and what I should ask for?
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Crna Legija
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eBay or mcmaster
'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
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Technician1002
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Look for an Ace Hardware. If you have one, they have a much better selection.
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