Large electrophoresis gel casting tray by Altec Labs. Includes tray base, cover, 4 fixation bolts and 4 holding cylinders. Inside chamber measures 12 X 12 X 1 1/2 in, total unit size 14 1/2 X 14 1/2 X 2 inches. Weighs 4 pounds. Very clean, no leaks, no cracks. Laboratory surplus from the National Research Council of Canada.