steel machine plate without hub #5,#8,#12, #22, #32,#42,#56 59~63 HRC steel machine plate without hub#12, #22, #32, #42, #52, #5659~63 HRChole size: 3mm 4.5mm 6mm 8mm 10mm 12mm 20mm stainless steel or carbon steel meat grinder machine plate and knife