These plugs are made of Natural Kynar® material, which has a temperature range of -62°C to 107°C (-80 to 226°F), and a pressure of 260 psi at 21°C (70°F)

This material can be autoclaved to 140°C (285°F) and meets USP Class VI requirements. Generally, chemically resistant to most acids, salts, weak bases, halogenated solvents, alcohols, nuclear and UV radiation, oxidants, ozone and deionized water.