... mold 3,high quality used for 5-10 years high speed,high quality steel plate for plastic extrusion mould.1, ... , material of the mould: special and superior stainless steel. the material of the mould is 3Cr17 Mo, ... and made in China. The hardness of stainless steel is HRC28-33. Of course, you can chose ... we have more than 20 engineers to design mould for customer.7,our company occupied area 15000m2, and ...