Aug 12, 2021 · Thermo Fisher vials with caps for HPLC sampling-Aijiren. 2021-08-12. Thermo Scientific crimp top vials for HPLC and GC are available in 8mm, mm, or 3mm crimp border diameter in clear and amber glass and plastic. Microsampling options for small-sample-volume injections include one-piece microvials and standard inserts added to crimp top vials.