MicroSolv's Headspace Vials are made of the highest quality borosilicate glass and each vial is camera/computer inspected for fit and form to assure reliable results. Aijiren™, CTC™, Leap™, Perkin Elmer™, Shimadzu™ & Varian™ Compatible. Choose from different brands, clear or amber, flat or round bottom, 5, 6, 9, 10, 12, 20 or 27ml