The McCormick A188653 is a genuine OEM piston ring designed for use in various McCormick Farmall series tractors. This essential engine component ensures proper compression and efficient engine operation. It is compatible with McCormick Farmall models including 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, and 150. This part is also cross-referenced as an equivalent OEM part for Case IH and International Harvester applications.