- Flexible silicone stopper designed to seal jars, bottles, and tubes in laboratories, kitchens, and homes - Silicone rubber material with excellent chemical resistance and durability - Withstands high temperatures up to 315°C (600°F) for short periods - T-shaped design provides efficient and secure sealing - Flexible, consistent, and resistant to breakage, shrinkage, and hardening - Easy installation and removal, no tools required - Pack of 12 white stoppers for holes with a diameter of 14-15mm - Carefully check the dimensions before purchasing