Hastings 3.661"/93.00 mm Bore +.060" Over Size, Single Cylinder Ring Set with 1.60 mm Top Ring, 1.75 mm Second Ring and a First Oil Ring is 3.50 mm.
This Hastings Single Cylinder Ring Set has a top ring manufactured from grey iron 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
1986-1990 Ford Bronco II
1986-1992 Ford Ranger
1988-1989 Merkur Scorpio
Attributes
1st Oil Groove 3.50
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 1.75
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2M4450S.060
California Proposition 65 No
Engborein 3.661
Engboremetric 93.00
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1.60
Top Ring Surface Treatment PLASMA MOLY
GTIN 00075538166191