Hastings 3.150"/80.00 mm Standard Bore, Single Cylinder Ring Set with 1.20 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 stainless steel with nitrided ring surface treatment, a second ring material and ring surface treatment not specified. The 1st oil control ring is manufactured of nitride rail/stainless expanison with a nitirded ring surface treatment.

Application Summary:

Year Make/Model
2000-2004 Mercedes-Benz A160
Attributes
1st Oil Groove 3.00
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 1.75
Alternate Part Number 2N4138S
California Proposition 65 No
Engborein 3.150
Engboremetric 80.00
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1.20
GTIN 00075538395898