Package Include: 1 x TVA6 Trigger Valve, 1 x O-ring Kit Fits For Bostitchh F21PL F28WW F33PT TVA6 Trigger Valve Replacement Replaces Max CN80548, TVA6 / TVA1 fits Max CN55, CN70 and CN80 Coil Nailers Repair Parts. TVA6 Trigger Valve Fits: N50, N57, N58, N60, N64, N70, N80C, N89C, N66, N100, N400, 650S4-2, 650S5-2, 750S4-2, 750S5-2, 850S4-2, 863S4-2, RN45, RN46, T40S5CLP, T50S4-2, F21PL, F38WW, F33PT, N75C, N86C.