Valve Rebuild Kit, For Use With 3UM04, 3UM05, 3UM06, 3UM07, Includes U-Ring, O-Rings, Screw Mach RH, Cap Retaining, Spring Compression, Solenoid Base Sub Assembly, Holder Assembly, Insert, Spring Compression, Core Assembly, Clip Retaining, Piston Assembly, Cup, Instructions Valve Rebuild KitsReplacement parts for Asco solenoid valves. For a complete list of kit contents, see DrillSpot.com .