hangzhou panheng Scientific Co., Ltd Material: 2ml Auto-sampler vial Feature of our flip off seal cap: 8-425, 9-425, 11-425 clear screw 12*32mm borosilicate type 70 with patch USP 1 expansion 33 51 white PTFE/red Silicone septa 11*1mm, 8*1mm red PTFE/white /red PTFE Pre-slit blue silicone open-toped . Address:hangzhou, Hangzhou, Zhejiang, China