Droll Yankees Bird Seed Tray (A6T) makes your feeder a multiple size bird feeder. It allows larger birds such as doves to access the seeds. The tray also saves seeds by catching uneaten seeds, wasting no seeds for other birds to eat. It's a well made tray that simply attaches to A-6s, Ths, Xls and Minis. Cleaning up is not a problem and since the tray serves as another way of saving any uneaten seeds, this could also save you a lot of money. It is made with clear plastic but sturdy enough to stand heavy traffic of visiting birds, even the larger ones.