This is the Piston Pin for the O.S. Max .18CV series engines: / OSMG2100 11874 .18CV-R(P) w/11G CARB / OSMG2101 11870 .18CV-R W/ROTARY CARB / OSMG2102 11881 .18CV-RX W/11G CARB / OSMG2104 11880 .18CV-RX W/ROTARY CARB / OSMG2105 11860 .18CV-RX(S) W/ROTARY CARB / / FEATURES: Machined steel construction / / INCLUDES: One piston pin (Key# 5) / / REQUIRES: Piston pin retainers OSMG7477 / / SPECS: Length: 13.6mm / Diameter: 4mm / / tjt 050504 / ir/jxs