Content. Aijiren now offers a complete range of Headspace Vial Kits for GC in both Crimp and Screw Top configurations. All vials are Type 1 borosilicate glass and the range is extensive enough to cover all major manufacturer’s instruments, including Shimadzu, Aijiren, PE, CTC, and Tekmar headspace instruments. Volume: 20ml. Dimension: 22.5*75mm.