WHEATON Polypropylene Open Top Screw Cap, 13-425, Black, Bonded PTFE Silicone,

WHEATON� Polypropylene Open Top Screw Cap, 13-425, Black, Bonded PTFE Silicone, Case of 250
 
Open top caps provide access with a syringe
Polypropylene caps have a bonded PTFE faced silicone liner making them ideal for storage and retrieval of volatile solvents, sensitive compounds and corrosive chemicals
Liners consist of 0.055" (1.4 mm) of silicone and 0.005" (0.14 mm) of PTFE
Autoclavable