The vials are preferentially used on instruments of the following manufactures:Beckman, CTC, Gilson, Knauer, Shimadzu, Spark,Varian,VWR (Merck®)/Hitachi, etc. (Please have a look at the autosampler compatibility chart to confirm the models. Crimp Neck Vials ND11 ND11 Crimp Vial Caps and Septa Why cooperate with us?