Hastings 3.307"/86.00 mm Standard Bore, 4-Cylinder Ring Set with 1.50 mm Top Ring, 2.00 mm Second Ring and a First Oil Ring is 4.00 mm.
This Hastings 4-Cylinder Ring Set does not specify Ring Material or Ring Surface Treatment

Application Summary:

Year Make/Model
1975-1978 Fiat 124
Attributes
1st Oil Groove 4.00
2nd Groove 2.00
Alternate Part Number 9516
California Proposition 65 No
Engborein 3.307
Engboremetric 84.00
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1.50
GTIN 00075538010012