Niteangel Wall-Mounted Hay Manger Feeder with Quick Locks, Rabbit and Guinea Pig Feeder Wall-mountable; No need screw. Keep a generous supply of hay in a clean, organized bin style feeder. Good for not wasting grass, and your pet will love it. Ideal for rabbits, chinchillas, guinea pigs or other small animals. Measures 9-1/2-inch width, 5-1/2-inch height, 2-inch depth.