HSS Rings for KOCKS mills/Tube mills/high speed wire mills Our HSS ring has good performance for the KOCKS mill, Seamless steel tube mill,and high speed wire mill, it's the good choice as the replace plan for the nodular cast iron ring and the TC rings. The hss ring size we supply from Dia200 to Dia650mm. This roll ring with tapered inner hole with high precision, test by the male guage.High Precision HSS Ring|Centrifugal Castingmale guage I test. The finishing HSS ring inner diameter test by male guage.we supply all kinds of hss rings for kocks mills, the performance is 3-5times of nodular cast iron ring.The hss ring for kocks performance may reach to 80% of TC rings, with better price and easy for fits and stock.