Looking for somewhere to stick your hay this is the perfect hay sticker. Perfect for them to pull the hay through the pine bars. This feeder comes pre assembled and is 500mm x 500mm x 430mm high. The tray area is 480mm x 350mm on the inside. Needs a $4 tray from kmart or pet store.Standard tray size is 410mm x 310mm x 9mm. The wood is pine ply and is safe for them to chew to there hearts content.