The JW® Clean Seed Silo Bird Feeder dramatically reduces seed spill outside the cage; while providing a clean supply of food. A convenient guard helps prevent seeds and shells from spilling out and helps to reduce spillage when the outer chamber is refilled. This gravity feeder helps stop hulls from building up as new seeds fall and push empty seed husks out of the tray. No more buildup of empty seed husks on top of uneaten seeds. Stops seed contamination from bird droppings. Can be filled from outside of the cage and will fit securely on all bird cages; including both vertical and horizontal bars with a clever screw-on design. The large size will hold double the amount of seed than the smaller size. An ideal gravity feeder for parakeets; canaries; finches; and similarly sized birds.Dramatically reduces food spill outside the cageHolds a huge supply of food - no need to refill every dayEasy to cleanDesigned for a bird's well-beingSuitable for parakeets, canaries, cockatiels, finches and other similar sized birds