This screw HPLC vial is compatible with robotic autosampler. This thread is much higher on the top of the vial allowing space between the bottom of the thread and the shoulder of the vial. aijiren 8-425 Screw top HPLC vial The 8-425 screw HPLC vials are made of borosilicate glass, which size is 11.6x32mm. 8-425 screw HPLC vial are preferentially used on instruments of the following manufactures:Beckman, CTC, Gilson, Knauer, Shimadzu, Spark, Varian, VWR (Merck®)/Hitachi, etc