Chromatography Vials, Caps, Septa & Inserts, Tubes, Crimper,
Product Description. 1.A rounded bottom is more sturdy and thus more resistant to the high pressure within the vial during the heating process. 2.10ml, 20ml clear or Amber precision thread vial. 3.Magnetic screw caps 8mm center hole. 4.Septa are blue PTFE sample side; White Silicone outside. 20ml Clear Headspace Vials.