Filter King is heavy duty all stainless steel built for commercial applications with American parts and labor, 1/3 HP motor and 5 Gal per minute reversible pump. The cooking oil passes through 2 unique patent pending filter systems which force and seal every drop through a microscopic filter process before returning to the fryer. We call this process the, "Double forced & sealed filtration process" which is the science behind our technology making it vastly different than many other machines in today's market.