MAKE SURE THESE FIT YOUR "MODEL" OF "PERKY PET" FEEDER!  WASTE of $$!!! Perky Pet needs to come up with a standard- I have 7 different styles of feeders but these don't fit ANY!!!  Furthermore you can't find a model number on the feeders if you've removed the packaging and paper - in other words if you have used them. I am going to have to toss a few in the recycling bin and buy only feeders with bee guards. VERY DISAPPOINTED.