Multi-purpose, maximum convenience! One mixing head does it all with this sleek, modern and compact design vortex mixer! Control switch with three operation selections (intermittent, off, continuous). Infinite position rotary speed control from Off up to approx. 3000 rpm. Made of durable, easy to clean ABS material and stable elastomer feet stabilize the unit and dampen vibration. 5 year warranty. Specifications: Speed range: 0 to 3000 rpm (shaking to vortexing) Orbit: 3.7mm Mixing Head Holding Capacity: Center pad area for hand held mixing; Assay plate x 1 (to be used with retention cords) Horizontally mounted: 50ml conical tubes x 2 or 15ml conical tubes x 2 or 5ml tubes x 2 (mounted in same retention space as 15ml) Vertically mounted: 1.5/2ml microfuge tubes x 4 or 0.5ml microfuge tubes x 6 or 0.2ml microfuge tubes (strip tubes) x 24 Weight 8.7 lbs./3.9kg Dimensions: 6.7" x 7.5" x 7.8"/17.1cm x 19cm x 19.7cm