Exclusive from Chris's Squirrels and More! No more losing antler pieces. This antler easily attaches to any cage 1/2" by 1/2" wire mesh and up. While the antler tips and pieces are a great supplement for all rodents, they do easily get misplaced or of course stashed. These larger pieces will last a squirrel probably close to a year before they'll gnaw it completely. Great for long term rehab or over-wintered babies. All antlers vary in length and size due to the nature of an all natural product.