Powerful orbital shaker has a unique 11.4" x 11.4" non-slip, rubber coated platform with raised edges that help contain spills. Holds flasks, petri dishes, staining trays and other containers with no additional accessories required. Up to two stacking trays (optional) can be added for increased capacity. Mixes from 20 to 100 rpm with 19mm orbit; measures 14” W x 14” D. Two-year warranty.