Hastings 3.484"/88.50 mm Standard Bore, Single Cylinder Ring Set with 1.50 mm Top Ring, 1.75 mm Second Ring and a First Oil Ring is 3.00 mm.
This Hastings Single Cylinder Ring Set has a top ring manufactured from steel with plasma moly ring surface treatment, a second ring manufactured from grey iron with phosphate ring surface treatment. The 1st oil control ring is manufactured of steel rail/stainless expansion with a chrome rail ring surface treatment.

Application Summary:

Year Make/Model
1988-1992 Mercedes-Benz 300CE
1986-1993 Mercedes-Benz 300E
1988-1991 Mercedes-Benz 300SE
1988-1991 Mercedes-Benz 300SEL
1990-1993 Mercedes-Benz 300SL
1988-1993 Mercedes-Benz 300TE
Attributes
1st Oil Groove 3.00
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 1.75
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2M4976S
California Proposition 65 No
Engborein 3.484
Engboremetric 88.50
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1.50
Top Ring Surface Treatment PLASMA MOLY
GTIN 00075538244332