This porthole weighs just over 6 pounds.  The outside edge of the frame measures 21 1/2 x 10 3/4 inches and has 15 mounting holes. The glass measures 17 1/2 x 6 3/4 inches. On the back, the raised flange measures about 1/2 inch deep. The two dogs work, the window opens freely and the arm functions to hold the window open. This porthole includes the original glass which is in good  condition with no cracks.