The Dual Strobe Arm 3" and 5" Package from Beneath the Surface is a set of accessory components for an underwater photography tray system. The package consists of 2 ball mount adapters #BMA, 6 standard arm clamps #ACS, 2 strobe adapters #ISA and 4 double ball arms of 2 different sizes - each pair being of matching size.
The BMAs attach to arm adapters or a bridge bar and are used to mount an arm system on your tray system. The ACS clamps, machined from a 6061 aluminum bar and then anodized, are durable, corrosion resistant and easy to tighten. They are used to hold in place an accessory arm on an underwater video lighting system. The hardware and spring are stainless steel. The clamp handle is a 2.5" (6.4 cm) long aluminum knob.
The included strobe adapters are used for attaching an Inon strobe to the arm system. The double ball arms are made from 6061 Aluminum bar and 304 5/16" Stainless Steel tubing. Both durable and lightweight, these arms each have 2 ball mounts. The arms are 3.0" (7.6 cm) and 5.0" (12.7 cm) long.