Micro-Inserts - Tisch Scientific. Micro Inserts decrease the surface area inside chromatography vials, enabling maximum sample recovery. They can be used with screw-top, snap-top or crimp top 0.1ml Micro-Insert, 31 x 5mm, Clear Glass, 1st hydrolytic Class . 0.1ml Micro-Insert, 31 x 5mm, Clear Glass, 1st hydrolytic Class, 15mm top (Qty/Pkg 100