The Bird Barrier Pro-Cone Corner acts as an exclusion device because of its shape and material. The cone is narrower at the outside opening so that animals cannot enter from that end. It is also a smooth plastic material that is very difficult for any animals to grasp. Keep in mind that this device is designed primarily for birds and bats, which would be able to fly out of the structure.
The Bird Barrier Pro-Cone Corner is an exlusion cone to allow target animals to exit structures, but not to re-enter them. Target animals include rats, mice, bats, sparrows, and squirrels. This corner piece has a 90 degree angle to fit onto the corners or other right angles of structures.