The Super Pet Gravity Bin Feeder is the most efficient and convenient means of supplying up to five days of pellets, grains or seed mix diets to rabbits, guinea pigs, ferrets, and chinchillas. Gravity Bin Feeders are injection molded from the highest quality chew resistant polymer. It will provide years of service–it will never rust. There are no sharp edges to harm your pet and it's hygienic and easy to clean. The self-locking snap-lock bracket was designed to securely hold the feeder in its desired location even with the most energetic pets. It can be mounted inside or outside any wire cage or can be adapted to glass, laminate, or plastic walled surfaces. The perforated sifter floor prevents pets from inhaling pellet dust (fines) while eating. This eliminates many common respiratory problems. This design also allows the fines to fall through the feeder floor and into the cage bottom, not outside the cage.