[ glass bottle] HPLC small bottle has heat resistance and high chemical resistance, suitable for reagents that accommodate acid, neutral and alkaline pH [Sealing Design] The small bottle of the laboratory adopts a screw design to that the seal is consistent. Silicone diaphragm and polytetrafluoroethylene provides evaporation and sealing for compound sample storage in the chemical industry and research laboratory [Easy to distinguish] Amber bottle has a white scale of 0.5 ml increment, and there is a large writing area for sample recognition or marking [Spiral Bottle] Our 2ml HPLC small bottle diameter is 12mm and the height is 32mm. It is suitable for ordinary automatic proofers [Extensive application] Laboratory small bottles are suitable for HPLC, , LC/MS applications and high -throughput analysis to obtain reliable results. Sample bottle can be used for automatic molding of all common fine -necked bottle Colour:brown Material:Glass Package Contents: 100 x Autosampler Vial Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.