Crimp/Snap Vials,Caps and Kits|laboratory vials cheap Scientific . aijiren crimp top vials for HPLC and GC are available in 8mm,11mm,or 13mm crimp border diameter in clear and aijiren glass and plastic. Microsampling options for small-sample-volume injections include one-piece microvials and standard inserts added to crimp top vials.