Dec 22, 2015 · Wholesales 18mm thread headspace vials for GC VWR Material: USP Type 1, Class A, 33 Borosilicate Glass Dimensions: 22.5 x 46mm/22.5 x 75mm Application: GC system Neck Diameter: 18mm Qty/Pack: 100pcs/pack Volume: 10-20ml Payment: T/T MOQ: 1 pack Get Price DATE : 22-12-15 China crimp top vials Manufacturers, Suppliers, Factory