Prevue Cuttlebone Holder is a sturdy, one-size fits all clip that holds treats, vegetables, millets, and all sizes of cuttle bones. Simply place the items into the clip and hang the holder from a horizontal cage wire. Size: 5" x 2".
This is the best holder made. I have had others and they do not hold up to my birds trying to chew pieces off of them. They do not bother these at all.