24mm VOA vials for lab use Wheaton Common use 20ml screw gc glass vials for lab test VWR Home » News » 20ml screw headpace vials » Common use 20ml screw gc glass vials for lab test VWR Common use 20ml screw gc glass vials for lab test VWR Material: USP Type 1, Class A, 33 Borosilicate Glass Dimensions: 22.5 x 46mm/22.5 x 75mm 10