DOV 750 Piston ring 64mm for 750DOV DOV750 DOV engine motor lawn mower water pump replacement # 590404 This piston ring is designed for use with DOV 750 engines.It has an outer diameter of 64mm and is compatible with models designated as 750DOV and DOV750.The part serves as a replacement component for small engine applications including lawn mowers and water pumps.It fits into the piston assembly to maintain compression and ensure proper engine.This ring is engineered to meet specifications for fit and function. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.