Accessories for Thomas vortex mixers include a variety of tube holders, vessel holders, ampule tube holders, single tube holders, a tube holder kit with retainer and a microtube and microwell plate holder kit with retainer. Foam Insert Kit with Retainer (8294B46) includes an insert retainer, vessel harness and one insert for 9-13 mm tubes, 14-19 mm tubes, and 20-25 mm tubes as well as a blank insert. The microwell plate kit with retainer (8294B60) includes a 48-hole microtube foam rack for 0.5 and 1.5 mL tubes, a microwell plate foam rack and insert retainer. Thomas No. 8294B70 cup head is a rubber adapter for test tubes, 8294B66 three-inch head is a plastic adapter that fits over the Mini-Vortexer and 8294B68 is a dimpled rubber three-inch head cover that fits over the plastic adapter.