Model EC-H (Model #156) Used to size and separate DNA restrictions fragments, plasmids, DNA's and RNA's. New gasketed gel tray walls slide in and out easily. No leaking, no tape, no mess! A sealer comb allows the user to pour agarose gels of variable length. The gel tray, fabricated of heavy duty UV transmissible Plexiglas©, is built to last. Comes with 1 Sealer Comb-13x24cm Gel Tray