United Scientific Silicone Stopper # 4

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
• Autoclavable
• Packs of 12
• Available in Size 00 - 8