Mahle OE plain ring set: a performance steel Napier second ring in plain configuration sized 3.801 in with 1.0 mm face specification and .136 in RW, supplied in a 48-count bulk pack per the description. Intended for rebuild or production use where these exact ring dimensions are required, the set provides catalog-specified sizing for compatibility.
Mahle Rings Perf Steel Napier 2nd Ring 3.801in x 1.0MM .136in RW Plain Ring Set (48 Qty Bulk Pack)