... : Circular Slitter knife for paper Material: Cr12MoV, 9CrSi, W6Mo5Cr4V2, W18Cr4VAdvantages:High tolerance finishing Hardness: 57-60HRC.We manufacure a number of circular knives, ... such as top& bottom slitter knife, dish slitter, flat slitter knife, drilling knife, rubber cutting knife ... ring114×100×40200×180×50200×162×92450×410×105 Circular Knives