This is the Robart 195L Large Air System Service Kit. This rebuild kit keeps your Robart air cylinders operating reliably and at peak efficiency. FEATURES: Contains everything needed to overhaul a 3-1/2" bore and a 1-3/8 bore Air Cylinder and the Control Valve (standard or VR), Fill Chuck, Fill Port, and Check Valve. Eliminates damage caused by dirt, sand, and moisture. INCLUDES: One Robart 195L Large Air System Service Kit with tube of grease, One tube of grease Two replacement needles One various sized O-ring set (Blue and Black) One various sized e-clip set One foam element Two knurled nuts One instruction sheet REQUIRES: Removal of Control Valve from aircraft and disassembly of Valve. RobartPart ROB195L