What store(s) can I find 5/32 pneuamatic tubing?
Great question. This topic was previously discussed on this tread.
I can vouch for the one from Grainger, as we bought some and where very satisfied with it. It looks identical to the stuff VEX sells but is colored red.
If you try out the significantly cheaper stuff that Eric_J proposed, please tell us whether it is good quality or just garbage.
Most of the pneumatic are manufactured by SMC Corporation. You can find the part numbers on the bags that are in the pneumatic kit.
I order the tubing through Motion Industries. They sell it in various lengths. I’ve bought it in 20 meter length for $ 14.20 (part # TU0425B-20), and in 50 meter lenght for around $20 (part # TU0425-50).
This is the exact tubing that VEX sells.
Amazon has the SMC tubing @ about .22 a foot with free shipping. Check http://www.amazon.com/gp/product/B0065RQIOO/ref=oh_aui_detailpage_o05_s01?ie=UTF8&psc=1