Micro volume vial inserts, when used in conjunction with autosampler vials, allow for maximum sample recovery and easier sample removal. Vial inserts (volume 0.15 mL, glass insert (with bottom spring), O.D. x H 6 mm x 38 mm) allow the use of smaller sample volumes with standard autosampler vials. Inserts should be chosen based on the inner diameter of the vial neck.