SILICONE STOPPER-UNITED UNSST2

Silicone stoppers are particularly useful due to their inert and nonreactive nature. It will not impair the growth of tissue cultures and resistant to most chemical acids and solvents. Stoppers can be steam sterilized at 15 lbs. pressure. Broad working temperature range of –62 to 232°C (–80 to 450°F). Durometer hardness ~50.