this is just plain ole pvc from lowes, the tank is made from 3" and is 9" long, i've heard so much about how pvc won't hold up so i thought i'd just see for my self, the experiment part is that i coated the inside with caswells 2 part epoxy tank sealer. i also made an identical tank for my 28" mongoose bike, but it is coated with the cheaper red coat tank liner.