next. Products. Zhejiang Aijiren is a one of the largest laboratory consumables manufacturer in south of China, which mainly supply HPLC vial, GC vial, Headspace vial, Closures and septa, pad and lid for vial, micro-inserts, micro-vial, COD test tube, EPA vial, TOC vial, Glass reagent bottle, syringe filters and other lab consumables.