This is the Replacement Steering Arm for the OS 21-XM Marine engine. / This mounts on top of the outboard unit and connects to the steering linkage. / / FEATURES: Aluminum construction / / INCLUDES: One steering arm / Two 3x10mm round-head machine screws / / REQUIRES: Nothing. This is a direct replacement part. / / SPECS: Length: 70mm (2.75") / Thickness: 1.6mm (0.07") / C.D. between mounting holes: 21mm (0.83") / / cmc 01/13/02 / ir/kh