... workshops of vulcanization,die cutting,washing and packaging are up to the relative cleanness classes.Quality mangement system established and consummated ... etcHardness:30~90 Shore A Size Standard:AS/BS/JIS B /ISO /DIN/GB Color:Black,Brown,White,Red,Yellow, ... Control:Internal QC controlPacking:neutral packing or other packing according to your needs.Sample:Free After-Sales Service: 100% responsible ...