... in K20 and K30.ZhaoFeng Cemented Carbide Co.,Ltd specializes in manufacturing high property cemented carbide/ tungsten carbide products, including various grades&specifications of ... .Usually the grade can be K20,K30,YG6,YG6X,YG8,YG15,YG20.Type: 01, 11,12, 13,20,22,23,S11 ...