Tisch Scientific 250 µL Micro-Insert, 29 x 5.7 mm for 9 mm Vials, Mandrel Interior and Polymer Feet, 100 Pack, Economical Packaging CV2044. Regular Price $18.84 Price $16.38. Add to Cart. Tisch Scientific 150 µL Micro-Insert, 31 x 5 mm for ND8 Vials, Conical Bottom, 100 Pack, CV2045. Regular Price $12.61 Price $10.96.