Wide Opening Crimp Top Vials 12 x 32 mm. Autosampler Vials, Closures and Inserts for HPLC and GC for Aijiren Features: • Wide opening vial is easier to fill • Fit most autosamplers that accommodate the 12×32 mm vial format • Superior quality 33 expansion borosilicate clear glass (Type 1, Class A) or 51A amber glass