A-B1697559-AI RING SET-020One New Aftermarket Replacement Ring Set (. 020 Oversize) Fits Briggs and Stratton (Fits Briggs & Fits Stratton) Small Engines This aftermarket replacement piston ring set is an . 020 inch oversize set designed for use in Fits Briggs and Stratton small gasoline engines that have had their cylinder bores honed or rebored to . 020 over standard size. The rings seat against the cylinder wall to seal the combustion chamber from the crankcase, maintaining