The MTD 753-1209 Trimmer Piston Ring 2-Set restores proper engine compression, ensuring smoother operation and dependable cutting performance. This set includes two precisely machined rings that create a firm seal between the piston and cylinder wall, allowing the engine to maintain efficient combustion. By reducing air leakage and supporting consistent power output, the rings improve... https://www.wholetoolbox.com/mtd-753-1209-trimmer-piston-ring-2-set-a31