Black polypropylene open top caps have a bonded PTFE faced silicone liner, 13-425 thread finish. 250 screwcaps/ case.

This case includes 250 black polypropylene open top caps with a bonded PTFE faced silicone liner and a 13-425 thread finish. Manufactured by DWK Life Sciences LLC, these screw caps provide secure closures for vials or bottles in laboratory settings. The PTFE faced silicone liner ensures a tight seal to prevent any leakage or contamination, making these caps suitable for various applications such as storage, sample preparation, or analysis. The 13-425 thread finish allows for easy and efficient sealing and removal of the caps. With this case of screw caps, researchers and lab professionals can conveniently stock up on high-quality closures to support their daily work with confidence in the product's reliability and performance.