Use these 11 mm clear glass vials with snap caps or aluminum crimp seal closures. Aijiren Techbrand™ 300 μL PolySpring Autosampler Vial Inserts. Aijiren Techbrand™ PolySpring inserts are available in glass or polypropylene and are compatible with 9 mm HPLC and GC autosampler vials. Aijiren Tech™ 9mm Wide Opening Amber Glass Screw Thread Vials.