DWK Kimble Black Polypropylene Screw Thread Cap, Welded PTFE-Faced Silicone Liner, 15-415, 288 pc/PAK

PTFE faced/general purpose white silicone liners are highly resistant to chemical effects PTFE faced/general purpose white silicone liners are highly resistant to chemical effects Closures are ideal for repeated autoclaving Welded liner technology eliminates the possibility of glue contamination