This Aquatica TLC Arm Set is designed for focus lights that have a Sea & Sea style mounting ring. You could also use this to hold a Sea & Sea strobe directly above the port for macro work. The arm screws into the 1/4 20 hole on top of Aquatica housings. The arm has a ball with 1/4 20 stud, 8" double ball section and Sea & Sea ball head adapter.
