Alternatively, of course, you can use inserts to reduce the capacity in the vial and create ideal conditions for removing samples. VWR autosampler vials, inserts, and closures vwr.com | VWR® autosampler vials, inserts, and closures 3Table of contents 8mm standard opening screw-thread Page 4 9mm wide opening screw-thread Page 5-6 10mm wide opening screw-thread Page 7 11mm standard crimp-top