Aijiren mainly supply autosampler vial, HPLC vial, GC vial, septa and caps, EPA vial, TOC vial, COD vial, liquid chromatography and Gas chromatography vial, reagent bottle with GL45/GL80 screw cap and glass stopper. All of the products is wholesale price. Aijiren has serviced more than 4200+ clients, Hope you service you. FAQ