These birds are available in 9″ and 13″ lengths. They feature through-wire construction with eyes at both ends for easy attachment of swivels/crimped loops. Injection molded high impact plastic construction. These work great for running ahead of a daisy chain or single lure. Adding a little commotion to your spread by rigging things with birds can sometimes draw strikes from bigeye tuna, yellowfin tuna, and billfish in certain situations that you might not have gotten otherwise.