Caps | Insert Barb x Insert Barb | Insert Barb x MIP | Spigot x Threaded | Threaded x Threaded | Threaded | 1-1/2" x 1-1/4" | 1-1/4" x 1-1/4" | 2" x 1/4" | 3-1/2" - 2-1/2" x | 3/8"-5/16"-18 | 6" | 10"-8" x