InSight Clean Seed Silo Feeder™ is a silo feeder with a number of major advances. -The feeder has a guard which keeps debris, shells and hulls from fallingoutside of the cage -- the biggest problem consumers are consistently report with bird-keeping. -The feeder prevents hull build-up on top of the seeds as new seeds fall out of the silo onto the tray, they push the old hullsout -- bird keepers are thrilled to see the end of this constant nuisance! -You don't need to carry a separate silo feeder for horizontal and vertical bar cages -- our feeder works for all sizes. No more selling thewrong feeder because the customer couldn't remember which way the bars of his or her cage ran. -Screws into the cage to guaranty a secure fit. -Easy toclean.