VWR volatile organic analysis vials cap and septa-Voa VWR volatile organic analysis vials cap and septa I-Chem™ Open-Top Septa Caps, 24-44mm, bonded Processed to meet EPA Performance Based Specifications for Volatile Organic Analysis Includes: Cap only Compatible with: For use with Thermo Scientific VOA Vials, bottles and jars. 297-244 closures are compatible with loose septa Cat. Nos.