Wholesale 20mm Crimp-Top Vial ND20. MOQ: 20 packs, 100pcs/pack; Material: USP Type 1, Class A, 33 Borosilicate Glass. Dimensions: 22 x 38mm/22.5 x 46mm/22.5 x 75mm. Application: GC system. Neck Diameter: 20mm. Qty/Pack: 100pcs/pack. Volume: 6-20ml. Payment: T/T.