Hastings 3.661"/93.00 mm Bore +.020" Over Size, Single Cylinder Ring Set with 1.20 mm Top Ring, 1.50 mm Second Ring and a First Oil Ring is 2.50 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
2004-2007 Buick Rainier
2003-2009 Chevrolet Trailblazer
2003-2009 GMC Envoy
2003-2004 Oldsmobile Bravada
Attributes
1st Oil Groove 2.50
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 1.50
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2M5227S.020
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 1.20
Top Ring Surface Treatment PLASMA MOLY
GTIN 00075538169772