... We have overcome the technical problem of anti-rust, hardness and tenability, sharpness with low noise, clean,shine,free of burr ... , REACH, FDA ,PAH and LFBG Standards and we have got the inspection and ananlysis certificates from TUV, AOV and SGS.With these 10 ... home-appliancemanufacturers ,we also produce and supply the wheel and core of pepper grider and coffee grinder, and the hardness is HRC 44-60 ...