Piston ring kit compatible BRIGGS STRATTON lawn mower engine lawn mower models Series 9D, 91400, 10B, 10D, 10E For 3.5 and 3.75 hp new models with thin rings TECHNICAL DATA Piston size: Standard Cylinder Ø in mm: 65,10 CODE: ORIGINAL CODE: BRIGGS STRATTON 498680 498681 CZ