Butyl rubber stoppers are made of butyl rubber including bromobutyl rubber and chlorobutyl rubber collectively known as halogenated butyl rubber. A wide variety of specifications  are including 13mm, 20mm, 26mm, 28mm, 32mm  and 34mm rubber stoppers.  Production according to ISO standards or as per your specifications.
 Closures for infusion bottles with or without coated
 Blood sampling stoppers
Ready-for-Sterilization closures; Ready-to-Use closures; Siliconization