Drain Opener, 6" to 8" SizeMfr #: 6810 Made in U. S. A with high quality material Drain King is the original water powered drain cleaner to ever enter the market Water expands Drain King from 6 to 10 inches to seal pipe and water pulsating jets clear the clogged drain quickly up to 1000 feet The bladder inflates within the commercial pipe and with water power clears clogs Important Tips: store in cool dark place, do not use with hot water. Minimum pressure to inflate is 40 psi