Sierra's 18-7127 O-Ring is designed for use in select Johnson/Evinrude, OMC, Chrysler/Force, Suzuki, and Mercruiser engines. The o-ring features a 3.315" I.D. and a 0.135" width. The package includes one o-ring. It is interchangeable with GLM 82370; Mallory 9-76527; Johnson/Evinrude Outboard 313446; Mercruiser Stern Drive 25-32507; OMC Stern Drive 313446; and Chrysler/Force/US Marine 25-32507, 25-F84305, and F84304. Check manufacturer recommendations to ensure a proper fit before purchasing. Each Sierra product meets or exceeds the original equipment part it replaces.