machining part 1.precise dimension 2 tight tolerance 3 heat treatment,blacked 4 good delivery machining part1. ... CNC machining, drilling and reaming hole, heat treatment and blacken.3.Finish: heat treatment RC 50-55, Blacked, other coating ... part ¢1~¢300pensuStainless steel4cnc machining part ¢1~¢300pensuStainless steel56781, professional workers2,precision size3,Good metal4,low price quick delivery5, ...