Butyl Rubber Stopper (20-B)

Used for injection vials.Cervical-diameter: 13.0 +/- 0.1mmCorona-diameter: 18.8 +/- 0.2mmCorona- thickness: 3.3 +/- 0.2mmTotal thickness: 8.8 +/- 0.3mm product offered by Aoxiang Pharmaceutical Packing Co., Ltd.