Porter Cable A08368 Nail Trigger Valve Assembly for Nailers, Not Threaded Models RN175 Type 1 & Type 2, RN175A, FN250 A&B, FC350 Type 1 2 & 3, COIL200 2", COIL250 5" Type 1&2, COIL350 5" Type 1&2, DA250 A&B Models FCP350, FR350 Type 1 2 & 3, FR350MAG Type 1&2, MS200 Type 1&2, FRP350 Type 1, FR350A Porter Cable engineered this model for professional results at a great value