Senco PW O-ring and Washer Valve Seal LB5002O-ring kit for the senco PW + PW-2 + Washer Firing Valve Seal LB5002 All O-rings in the tool. Schematic break down and O-ring reference sheet with every order. Post navigation Senco SN4 SN70 Rebuild O-ring Kit Plus LB3500 Senco Model L Parts