Adjustment rings / control rings made of first-class gauge steel, hardened, tempered, grounded and finely lapped. The adjustment rings are labeled with the actual dim. Tolerance for the hole is JS4.
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.