Crimp Seal Vials found in: Headspace Vials, Standard 22 x 38 Crimp Top, 11mm Crimp Seals, Wide Opening Crimp Top Vials, Standard Opening Crimp Top Vials,.. Clear glass vials with 20mm crimp seal finish are designed to fit most headspace autosamplers Flat bottom vials maximize heating efficiency when used with bottom Round bottom vials are more easily handled by robotic arms that lift the vial