Prevue Pet bin feeder 3500 is made of powder-coated gravity metal which holds up to a 5-day supply of food. The mesh bottom allows pellet dust to sift out of the feed trough. The movable hooks hold the feeder snug against the inside or outside of any cage. The feeder can be used for either food pellets or Timothy hay. Designed for rabbits, guinea pigs and other similar-sized animals. Feeder measures 4 1/4" long, 3 7/8" wide, and 7 1/8" high.