The IB57020 is a UVT casting tray designed for use in the IB57000 (HR2525 Horizontal Electrophoresis System). It is constructed of OP-1 grade cast acrylic to allow the passage of UV light during the viewing the elecrophoresis gel run. This tray produces a gel measuring 25x25cm, and has 4 equal length runs of approximately 2.5".