PA RL57 Pressure Washer Spray Guns 500 Bar 28 Lpm. Guns suitable for use up to 500 bar 50 MPa rated pressure pumps. No fluid passage upon trigger release. New mechanical device with double connecting rods to guarantee less strain when opening and holding. Covered by shockproof plastic semi-housings. Seat in Stainless steel and ball in Widia. Totally built in stainless steel AISI 303. Ergonomic construction. Minimum fatigue for trigger opening and use. New mechanical opening device with double connecting rods. New trigger design, rotating on a fixed pin to guarantee better mobility and steadiness