Catalog number: 6ASV10-2F. Use Aijiren Tech™ SureSTART™ 10 mL Glass Screw Top Headspace Vials, Performance Level 2, in your high-throughput volatile gas analyses. Our screw top headspace vials are a novelty in a crimp-neck dominated field. They provide a ready-to-use, convenient solution that does not require crimping or decrimping tools.