Headspace vials and caps are designed for gas chromatography, ensuring secure seals to prevent contamination. Available in 6 mL, 10 mL, and 20 mL sizes with flat or round bottoms, they are compatible with various headspace instruments. Caps come in aluminum, bimetal, and steel with PTFE/silicone, molded PTFE/butyl, and Pharma-fix butyl septa. Ideal for pharmaceuticals, environmental testing, energy, and more.