My dog likes to sit on top of my printer and look out the window. He's only 10 pounds, but he's still heavy enough that I'm afraid he'll break the Auto Document Feed tray.

The printer is an Epson ET-4550, from the EcoTank line. There is a slight angle to the output tray, and ridges on top and bottom that need to line up. I doubt this part will work on a different printer model, but you're welcome to try.

The part is 3cm x 3cm x 3cm. It could be a little wider, but it seems to work ok.