This is a serious grease gun! The gun develops 10,000 psi and features 3 way loading: cartridge, suction or loader pump. Features an extra long solid lever for maximum leverage, a built in check valve and loader fitting. The gun outlet is 1/4" NPTF, has a delivery of 1 oz per 20 strokes and a capacity of 24 oz. This gun includes a rigid extension and coupler. Manufactured by Alemite.