Screw neck vials, ND8. Vials Chromatography Vials. These vials are for use on instruments from the following manufacturers: Beckman, CTC, Gilson, Knauer, Shimadzu, Spark, Varian, VWR/Hitachi, more. Standard vials for GC and HPLC. Ideal for use with VWR/Hitachi instruments. Broad range of micro-inserts. Vials and seals also available as 2 in 1 kits.