WHEATON® Amber Glass Vials, 1.5mL or 0.06oz, 8-425 Screw Thread Finish with PTFE /Silicone liner, Black Caps, Type I Borosilicate Glass. (1.5 mL Vial In Vial File, Clear, PTFE Liner)These glass vials are the original design used in most autosamplers requiring traditional screw top vials. The vials are manufactured from Type I borosilicate glass.