20mm Headspace Crimp Vials. 651401. 6mL Clear Crimp-top Headspace Vial, Flat Bottom , 22*38mm (6mL Karl Aijiren Tech Vials) 1000. 651402. 10mL Clear Crimp-top Headspace Vial, Flat Bottom , 22.5*46mm. 1000. 651403. 10mL Clear Crimp-top Headspace Vial, Round Bottom , 22.5*46mm.