Welded | Socket Weld x Threaded | Socket Weld x MIP | Threaded x Threaded | Threaded | 1-1/4" x 1-1/4" | 1-1/4" x 3/4" | 1" x 1" x 1/2" | 1" x 3 | 3/8" x 1/4" | 3" | 4" x 1-1/2" | 4-1/2"