100/500/1000Pcs 10ml Glass Vials Amber Headspace Vials with Plastic Aluminum Cap. Model : 2/3/5/10/20ml Headspace Vials. A 20mm vial crimper（Not Provided） is required to fully seal the aluminum cap. High-Quality Materials: These sample vials are made of quality borosilicate glass that is more resistant to thermal shock (Temperature range: -328℉ to 392℉).