Polypropylene Cap with white PTFE/Red Silicone Septa. Center hole Diameter   5.5 mm. Suitable for 9mm short thread vial (BS-01-JYP/BS-02-JYP) . White PTFE Screw-Thread Cap. 

Features:

1. Polypropylene Cap with white PTFE/Red Silicone Septa   
2. Center hole Diameter  : 5.5 mm    
3. Suitable for 9mm short thread vial (BS-01-JYP/BS-02-JYP)  
4. White PTFE Screw-Thread Cap