Vial, Cap, Syringe Filter manufacturer / supplier in China, offering Alwsci Autosampler GC 20ml Vial Aluminum Crimp Cap with Septa 3mm Thick, Labfil 47mm Nylon Membrane Micron 0.22um Filters, Alwsci Factory Wholesale 40ml EPA VOA Vials and Caps Kit and so on.