Vial / Tube Sizes Reaction Vial Inserts come in the following sizes 4 position unless stated otherwise: (size refers to the diameter of the hole) • 11.80 mm (will fit 2 mL HPLC sample vials) This size is a 9 position insert. • 15.00 mm (will fit 1 dram vials) This size is a 5 position insert. • 16.20 mm (will fit CEM microwave tubes) • 17.40 mm (will fit Biotage 2-5 mL microwave tubes & for 2 dram vials) • 20.20 mm (will fit robot tubes) • 24.40 mm (will fit 24 mm boiling tubes) • 25.75 mm (will fit Wheaton reactor vials) • 27.65 mm (will fit 20 mL Scintillation vials) • 28.20 mm (will fit Biotage 10-20 mL microwave tubes)