2ml Standard Opening Screw Top (8-425) Vials The 8-425 are standard vials for GC and HPLC and are designed to work in a broad variety of autosamplers requiring narrow neck vials. Vials are preferentially used on instruments from the following manufacturers: Beckman, CTC, Gilson, Knauer, Shimadzu, Spark, Varian, VWR, Hitachi, etc.