This is the replacement Valve Assembly for OS engines: / FS-120 Surpass II / FS-120 Surpass w/o pump / FS-120 Surpass SP / / PACKAGE INCLUDES: / 1-Exhaust Valve (OSMG9198) Steel / 1-Valve Spring Exhaust (OSMG9247) Steel / 1-Valve Spring Retainer (OSMG9230) Black plastic / 2-Split Collets (OSMG9226) Steel / / SPECS: / Valve Length: 30mm / Valve Diameter: 2mm