United Scientific Supplies UNSST5A Silicone Stopper, Solid, # 5-1/2

Features:

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