Hastings 3.248"/82.50 mm Standard Bore, Single 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 SingleCylinder Ring Set has a top ring manufactured from steel 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
1965-1969 Porsche 912
Attributes
1st Oil Groove 4.00
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 2.00
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2C6801S
California Proposition 65 No
Engborein 3.248
Engboremetric 82.50
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 00075538056058