Black phenolic screw cap Poly-Seal liner is manufactured from low density polyethylene Unique cone liner design offers superior torque retention and excellent sealing characteristics It is recommended that liner be tested prior to use for leak resistant applications

Aluminum foil-faced pulp board liners Use these caps with organic solvents

Resistant to moisture vapor Chemical barrier Autoclavable Caps have excellent properties of resilience. The 14B white rubber lining material consists of homogeneous sulfur cured styrene-butadiene rubber. FDA Status complies with 21CFR 177.26, "Rubber articles intended for repeated use."