This swivel top tee has a top liner connection which spins 360°. During liner installation it is sometimes difficult to get the tee body connection to align properly with the thimble. The advantage to this swivel feature is you can spin the tee body from the thimble without having to turn the entire liner from the top of the chimney. This tee will save valuable time from having to turn the liner by hand at the top of the chimney. This tee has all the same features as our standard 24ga 316 and 304 style tees.