These organic series vials consist of clear glass vials with solid-top closures. The closed-top closures have PTFE faced 14B white styrene-butadiene rubber liners. The cap material is black phenolic; the cap and the liners are autoclavable. With all organic vials, PTFE and type 1 glass are the only surfaces that will make contact with your sample. This sample vial and closure combination provides an extremely inert and chemically resistant environment for harsh, sensitive and reactive samples. Sample Vials in Lab File™ are packaged in corrugated trays with partitions.