Link to the instructables article (not written by me): http://www.instructables.com/id/How-to-make-air-muscles!/ Silicone tubing - McMaster 51135K281 Braided wire loom (polyester) - McMaster 9284K413 http://benkrasnow.blogspot.com/2011/02/how-to-build-air-muscle-and-use-it-in.html