Classification: Laboratory Bottle Brand Name: Aijiren Model Number: 20ml HS Place of Origin: Zhejiang China (Mainland) Glass vials we offered are made from clear, Type I borosilicate, 33 expansion glass or amber, Type I, borosilicate, 51 expansion glass, with or without marking spot .Screw Caps are made from Polypropylene.Septa is PTFE/Silicone.