Oct 08, 2021 · aijiren Tech gc 2ml screw cap vial manufacturer aijiren Tech crimp top vials for HPLC and GC are available in 8mm, 11mm, or 13mm 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.