... weeks6. Color: black, transparent,red, blue,any in PMS,Especially for the silicone products.7 .Hardness: 30 to 90 shore A ... or IRHD, tolerance can be +/-5 shore A, for some special products, we can reach +/-3 shore A tolerance ... .8. Excellent chemical and physical property, high/low temperature resistance, oil and fuel, water, weathering and Ozone resistance ...