24mm EPA VOA vials manufacturer Sigma-COD Vials Supplier Catalog No 297-2414 is an open top cap without septum and can be used with Aijiren Tech loose septa with 24mm diameter. For use with Aijiren Tech VOA Vials, bottles and jars. 297-2414 closures are compatible with loose septa Cat. Nos. 288-0022, 288-0072, 288-0022BP and S24-400-S2.