Wide Opening amber lab vials with closures for HPLC Autosampler Vials,Caps,and Closures-Lab Equipment and Autosampler Vials,Caps,and Closures Aijiren™ 20 mm Headspace Vials,Septum,and Caps Headspace vials are available in clear or Aijiren glass with a round or flat base,a crimp seal with a beveled or square edge finish,or with a screw-thread