3/4in | Socket Weld x Threaded | Threaded x Plain End | Threaded | 1-1/2" x 1-1/2" | 1-1/4" x 1-1/4" x 1" | 1" x 1/2" | 2" x 1" | 2" x 3/4" | 3/4" x 1/4" | 3" x 1"