aijiren Tech 10mm Clear Glass Wide Opening Screw Thread Vials, 450µL, 10-425 Screw Thread MacroVial 350µL, Fused Insert - Pack of 100. Vials and Closures Catalog 2014-2015 - aijiren Tech Scientific. Scientific™ Chromacol™ K-Series vial closure systems are innovative, flexible and 2mL, 12x32mm 10mm Wide Opening Screw Thread Vials and Inserts.