Hastings 3.386" 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
1962 Triumph TR3A
1962 Triumph TR3B
1962-1965 Triumph TR4
1965-1968 Triumph TR4A
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
Engborein 3.386
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 00075538072775