Hastings 2.910" Standard Bore, 4-Cylinder Ring Set with 1/16" Top Ring, 1/16" Second Ring, and a First Oil Ring is 5/32".
This Hastings 4-Cylinder Ring Set has a top ring manufactured from grey iron with triple chrome ring surface treatment and a second ring manufactured from grey iron with a 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
1967-1968 Triumph Spitfire
1975-1980 Triumph Spitfire
Attributes
1st Oil Groove 5/32
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 1/16
2nd Ring Surface Treatment PHOSPHATE
California Proposition 65 No
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1/16
Top Ring Surface Treatment TRIPLE CHROME
GTIN 00075538060437