8mm Screw Neck Vial In Stock. Standard vials for GC and HPLC,small caliber, 8-425 standard screw thread , It is suitable for autosampler and sample storage. It can be used with matched septa. 8-425 autosampler vial always be applied to Shimadzu, Spectra-Physics, Varian, and other autosampler. The clear one is made of USP type 1.