10.5 inch seed tray has a fluid design to match the sophisticated lines of the onyx feeders. Ingenious tray design allows the tray to remain on the base of the feeder when removing the base for cleaning. Attaches easily with the sturdy wing nut that nest under the tray. Feeder and tray rest firmly on the ground during refill. UV stabilized polycarbonate. Made in the usa. Size is 10.5 Inch. Dimensions are 10.5 X 10.5 X 1.5 UPC Code = 021964102173