Service Kit For 775 Series Spray Guns Kit Includes: Part #1-20-28 - Head Attach Gasket Part #1-20-34 - Trigger Shaft Part #1-20-35 - Trigger Screw Part #1-71-01 - Tip Gasket Part #1-71-11A - Packing (1 set) Part #1-71-13 - Packing Part #1-71-21 - Packing Nut Part #1-71-37 - Air Valve Packing Part #1-71-38 - Gasket (2ea) Part #1-71-42 - Air Valve Spring Part #1-71-50 - "E" Clip Part #1-775-24 - Needle Spring Part #1-775-41X - Air Valve Part #1-PLT-11B - Packing Seal