With the demand for better product stability and performance in glass, septa and caps, we developed Verex HPLC / GC vial products with high quality materials to. Vials -.:: Alovie Technologies ::. 1) HPLC / Autosampler Vials, Caps & Septas 8mm, 9mm, 11mm, 13mm,Vials Rack, 13mm vials have a 13-425 GPI thread and can hold up to 4ml of sample.