Gravity Bin feeders hold up to two pounds of food giving your pets a five day food supply. Gravity Bin feeders exclusive snap-lock bracket system attaches directly to any wire cage. Gravity Bin feeders feature an unique, sifter floor design that eliminates pellet dust, helping to prevent respiratory problems in small animals. Kaytee suction-cups (sold separately) can be inserted into the snap-lock bracket allowing you to secure a Gravity Bin feeder inside a glass enclosure.