... also NBR, SBR, CR, NR, etc),as your request , Environmental Friendly, to give you optimized material performance in ... 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, ... are welcome, logo and NO. as your request.10.Package:regularly clean PP bag inside, strength ...