stainless steel mobile phone parts,metal keying buttons 1.Iron,stainlesssteel 2.Nonstandard,on request 3. ... Precision special-sh Stainless steel mobile phone parts,metal keying buttons material size stainless steel: 304,316L,17-4PH >0 ... injection molding MIM structural components, precision steel casting; cam , metal buttons, spherical oil bearings, bushings, bushing; copier parts, printer parts, ...