i have three pots. one is a sears tank. had it for over 10 years, had to replace the seal once. the other two are both general pnumatics, one is from harbor frieght. its not the best, wont go higher than 30psi without leaking. but it gets the job done. the black one i got from a bud. not sure where he bought it , but it works great and is coated with teflon. makes it a lot easier to remove resin splatters.