Bel-Art Stir and Add Cuvette Mixer; for Semi-Micro Cells (Pack of 3) (F37752-0001) Featuring a linear handle, this mixer is ideal for adding and mixing enzymes or other reagents to solutions in cuvettes Vertical stirring action in cell offers thorough mixing For semi-micro cells Shaft diameter - 3.17mm (0.125"); shaft length -13.0cm (5.1"); mixing end dimensions - 0.92 x 0.35cm (0.362 x 0.140") Pack of 3