O.S. Piston Ring - O.S. 105

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This is the Replacement Piston Ring for the O.S Max 108FSR or O.S 105 Engine.This piston ring goes around the piston in the groove. FEATURESAll steel constructionINCLUDESOne metal piston ring.REQUIREMENTSPiston, if neededSPECIFICATIONSStatic, non-compressed dimensions:Inner Diameter: 27.5mm (1.08")Outer Diameter: 29.5mm (1.16")Ring Thickness: 1mm (.04")COMMENTSAt the "split" of the ring, it features a locating groove to fitthe locating pin that is on the piston. Show more