Labard universal shaker is a compact, heavy-duty variable speed shaker. It is used for the agitation of electrophoresis gels and filter assay media for staining, de staining and assay development. The Shaker accommodates a variety of vessels. It is continuously adjustable from 10 to 350 RPM. This de-sign incorporates an orbital platform that accepts a variety of optional trays. A variety of tray models are available, including three equipped with flask clamps for common sizes of flasks. Peg and Grommet style trays make changing convenient. The timer circuit permits automatic shut off after 3-120 minutes.