Marus Foot Control Rebuild Kit (Marus #85R186) Kit includes: PN 6011 Large Spring, PN 6018 Piston, PN 2210 Piston O-Ring (pack of 12), PN 6012 Conical Spring, PN 2207 Body O-Ring (pack of 12), PN 9010 Poppet, PN 6016 Poppet Cap, PN 6013 Toggle Spring, PN 5948 Pilot Valve, PN 9746 6 x 1/2 Pan Head Phillips Screw, PN 6014 6-32 x 1/4 Pan Head Phillips Screw For Repairing Older Marus Style Foot Controls 55R527, 55R531, 55R535 Foot Controls Marus OEM # 85R186