CAPS Black phenolic cap has a securely mounted LDPE cone-shaped liner which offers a two part seal. The closure forms a seal around the rim and the polyseal cone forms a seal against the inner diameter of the vial opening. Specially formulated phenolic resin to withstand the effects of repeated autoclaving Designed for superior torque retention Stress crack resistant Excellent for sample storage and re-sealing Identified in ASTM Specification E982, Class A requirements GPI Finish : 24-400 Case Qty : 144