Highly rust-resistant 420 stainless steel Features the E.F.S. process that produces a mirror-like finish Disc flatness held to one lightband (.0000116in.) and finished to within one micro inch or less for zero runout
Highly rust-resistant 420 stainless steel Features the E.F.S. process that produces a mirror-like finish Disc flatness held to one lightband (.0000116in.) and finished to within one micro inch or less for zero runout