Closure of one-piece construction with a seal achieved due to a unique inner sealing ring. Intended for use with 73750, 73760 and 73770 disposable culture tubes and 73785 disposable centrifuge tubes. Natural polypropylene Autoclavable Designed from ASTM Specification E982

Excellent for general laboratory use Specially formulated phenolic resin and liner adhesive to withstand the effects of repeated autoclaving PTFE-faced/general purpose white rubber liners are highly resistant to chemical effects Identified in ASTM Specification E982, Class A requirements