Qorpak GLC-00980 Borosilicate Glass 4mL Clear Type I Screw Thread Vial, with Green Thermoset F217 and PTFE Lined Cap Attached, 15mm Diameter x 45mm Height (Case of 144) Clear screw thread vials offer maximum visibility Product allows users to properly secure closures at the correct degree of torque to ensure a proper seal Providing exceptional resistance to heat shock and chemical leaching Attached green thermoset (phenolic) are known for providing the widest range of chemical compatibility and for being the most temperature tolerant of plastic closures Measures 15 millimeters diameter by 45 millimeters height