Rubber Bottle Stoppers Self Healing Injection Ports. Use 1/4 inch or 7mm drill or punch for making an opening. Fits 13mm Bottles with 7mm opening. 100% Steam Sterilization Safe
- Premium Injection Ports (Steam Sterilization Safe) 13mm
- Smaller for Increased Sanitary Conditions
- 13mm rubber stoppers are for a 7 mm or 1/4 inch diameter hole opening
- Excellent Heat Stability (Butyl Rubber) 100% Steam Sterilization Safe
- Great for liquid culture and BRF Jars or Rye Grain Jars
- Premium Injection Ports (Steam Sterilization Safe) 13mm
- Smaller for Increased Sanitary Conditions
- 13mm rubber stoppers are for a 7 mm or 1/4 inch diameter hole opening
- Excellent Heat Stability (Butyl Rubber) 100% Steam Sterilization Safe
- Great for liquid culture and BRF Jars or Rye Grain Jars