... I, borosilicate, 51 expansion glass, with or without marking spot .Screw Caps are made from Polypropylene.Septa is PTFE/Silicone. Manufactured ... , 1.5mL vials, amber vials, clear vials, sample vials, screw vials, screw thread vials, crimp vials, snap vials, storage vials, headspace vials 60mL ...