Products. 1.5 ML/2ML 8-425 Screw Neck Autosampler Vials ND8. Material: USP Type 1, Class A, 33 Borosilicate Glass. Volume: 2ml (standard volume) 1.5ml (actual volume) Application: HPLC and GC system. Dimensions: 11.6 x 32mm. Neck Diameter: 8mm. Qty/Pack: 100pcs/pack. Payment: T/T.