Socket Weld True Union | Socket Weld x MIP | Spigot x Threaded | Threaded True Union | Threaded x Threaded | Threaded | 600lb | 1-1/4" x 1-1/4" | 2-1/2" | 2" | 3/4" x 3/4" x 1/4" | 18" - 10" x 1-1/4" | 9.1" x 16.8"