Plastic 3-inch (76mm) platform with rubber cover (consists of Part Nos. 0K-0500-901 and 580-2013-00) for mixing and vortexing in beakers, flasks and multiple tubes. The plastic 3-inch platform with rubber cover may be used on the Vortex-Genie 1, Vortex-Genie Pulse and the Vortex-Genie 2 family of mixers.