... we welcome trial order before mass production. 1. Materials advice: silicone and rubber (EPDM, also NBR, SBR ... to your specification,drawing or samples,welcome any shape.5. Rapid development line, from drawing, new ... black, transparent,red, blue,any in PMS,Especially for the silicone products.7 .Hardness: 30 to 90 ... IRHD, tolerance can be +/-5 shore A, for some special products, we can reach +/-3 shore ...