Creative Foraging Systems 661 Large Refill Boxes, 3 inches Wide X 6 inches
The box is heavy enough to maintain its configuration and designed to be torn apart so that the bird can access the food hidden inside. Birds must chew into the box to find food, having discovered the source they then chew thru the honeycomb to continue feeding. 15 Boxes Per Pkg. May Be a Monthly Supply Used With the Foraging System Feeders.