China 1-4ml-Autosampler-Vials,6-20ml GC Headspace Vials Zhejiang Aijiren Technology,Inc is a global supplier of life-science,chemistry,laboratory consumables,etc. Our major products are high performance liquid chromatography & gas chromatography consumables such as Chromatography Autosampler Vials with closures,inserts,crimper and syringe filters,etc; Water analysis consumables such as COD