for 20mm antibiotics vial butyl rubber neck dia.: 13.0+-0.1/13.2+-0.1 mm colour: grey OEM available

(1)With ISO9001 Certificate(2)nature/isporene  rubber stopper for infusion bag/lyophilization/serum vial stopper/injection vial(3)size:we could produce as  you need

Nominal Dimension: 12,13,15, 16, 17 With High purity, Low puncture outfit retentivity, Excellent puncture outfit retentivity, Non-transpire of puncture and good self-sealing quality.

Pharmaceutical 20mm green Buytl Rubber stopper