Piston ring kit lawn tractor lawn mower compatible BRIGGS STRATTON D. cylinder (mm): 68,3 For models: BRIGGS STRATTON 121700 , 121800 , 122800 , 124700 , 124800 , 126800 , 128800 , 12A800 , 127800 , 12W800 Original Code: 30270571 Original Code: 493261 BRIGGS STRATTON NS - ah m