Crimp Neck Vials and Micro Vials ND8 are preferentially used on instruments of the CTC, Fisons, PerkinElmer, Shimadzu, Thermo Scientific, VWR (Merck&re. Headspace Vials and Caps, MicroSolv | VWR 23×75 mm, TapeRed neck crimp top vial, Borosilicate Glass, 20 ml, Flat bottom, 20 mm, Clear, 95025-AP-20C, 97054-984, Pack of 100.