Mastelf Autosampler Vials made from borosilicate glass meet ASTM Type I Class A and USP Type I standards. Makes your laboratory more efficient by reducing costs and saving time. Perfect fit Aijiren, Waters, Varian and Shimadzu Instruments. Headspace Screw & Crimp Vials. These beveled neck Screw & Crimp vials are available in both 6mL, 10 mL and