20mm Gamma Irradiated/Gamma-Sterilized Bromobutyl Rubber Stoppers

20mm Round Bottom Stoppers, gamma-Irradiated at a minimum 25 kGy (Cobalt-60). Made of bromobutyl rubber, free of natural rubber latex. Independent 3rd party testing for CFU and Endotoxins. Packaged in a double-polyethylene bag with gamma-irradiation indicator. Each bag is lot labeled for traceability to both your CFU/Endotoxin testing paperwork and invoice.