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. ˜ 32 x 12 mm, 2ml, screw neck. ˜ St anda rd now eck siz .