Mahle OE plain ring set in Gas Nitride Steel is sized 4.205 in with .043 in thickness and .157 RW and offered in a 48-piece bulk pack. This set is intended for bulk piston rebuilds or shop stocking where multiple identical plain ring sets of that dimension are required. Use these when the specified 4.205 in sizing and gas-nitrided finish match your rebuild specifications.
Mahle Rings Perf Gas Nitride Steel 4.205in x .043in .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)