Scientific Industries' Vortex Genie 2 mixer is designed for use with tubes up to 25ml (and flasks using the 75mm diameter attachment supplied). Die-cast metal, stable housing with noise reducing feet. Adjustable speed range 600 to 2700rpm and switchable continuous or touch operation modes where mixing commences when pressure is applied to the top cap. Overall 122 x 165 x 165mm W x D x H. Weight 4kg. For 220V 50Hz single phase supplies.