The Mahle OE oil ring assembly is a gas-nitrided steel oil ring sized at 4.0551 inches with a 3.0 mm section and .127-inch ring width. Intended for gasoline-engine piston assemblies, this oil ring set supplies the oil-control component used in rebuilds and repairs. The description conveys the precise sizing and nitrided-steel construction noted in the source material.
Mahle Rings Performance Gas Nitrid Steel Oil Ring Assembly 4.0551in x 3.0MM .127inRW Plain Ring Set