DWK Life Sciences (Kimble) Black Phenolic Screw Thread Caps with PTFE-Faced Rubber Liners
These caps are excellent for general laboratory use and feature a specially formulated phenolic resin and liner adhesive to withstand the effects of repeated autoclaving. The PTFE faced/general purpose white rubber liners are highly resistant to chemical effects. Identified in ASTM Specification E982, Class A requirements.