Threaded Flange | Socket Weld x Threaded | Conpression | Threaded x Threaded | Threaded | 1-1/4" x 1-1/4" | 1" x 1/4" | 1" x 3 | 2-1/2" x 1" | 2" x 1-1/4" | 3-1/2" - 3" x 1" | 3" | 4" x 1-1/2"