Application-Aijiren Vials for HPLC/GC. The 12X32mm crimp vial and aluminum cap are the most economical choice, and it is also very convenient to use with the crimp tool. 2ml clear glass crimp vials, 11mm crimp neck The 2ml snap autosampler vial is often used in conjunction with the automatic sampler. crimp neck 20mm gc septa vials-Crimp Vial