Sea frogs 2PCS 8 Inch Dual Ball Arm for Underwater Lighting, Aluminum Alloy Double Ball Joint Mount for Camera Tray, Video Light & Strobe Positioning

Two fully independent ball joints allow you to aim your light or strobe at almost any angle without affecting the other end. Fine tune your beam placement for macro details or wide angle scenes with smooth, precise movements. Each ball head contains a compressible silicone rubber ring that generates even clamping force when tightened. Your accessory stays locked in place even during strong currents, yet the joint releases easily when you need to readjust. Machined from corrosion resistant aluminum alloy with a hard anodized surface, this arm stands up to repeated saltwater use. It adds minimal weight to your travel bag while offering the rigidity needed to support professional video lights. The arm body features a reinforced open frame structure that resists twisting and flexing. Unlike solid round bars, this design provides better stiffness without extra bulk, keeping your lighting angle steady throughout the dive. Compatible with any underwater tray or accessory system that uses standard 1 inch ball sockets. Three configuration styles are available to match your specific mounting needs. Package includes one double ball arm only.

Getting your lights exactly where you want them underwater can be frustrating. Most single joint arms force you to compromise between reach and angle, and they often sag under the weight of larger strobes. This dual spherical arm solves that problem by giving you two completely separate adjustment points.

Think of it as two ball heads connected by a rigid center link. Secure the base joint to your tray or another arm, attach your light to the top joint, and then dial in the perfect beam direction with independent control. Want to aim a video light slightly upward while keeping the arm level? No problem. Need to offset a strobe to eliminate backscatter? This arm makes it easy.

The locking mechanism is simple but effective. A silicone rubber O ring sits inside each ball socket. When you turn the locking knob, the ring compresses evenly around the ball, creating a strong friction grip that holds tight without damaging the metal surface. We have tested this design through hundreds of dive cycles, and it continues to perform reliably.

Durability comes from the materials. The entire arm is CNC machined from marine grade aluminum alloy, then hard anodized to resist saltwater corrosion. It will not rust, pit, or seize up after repeated exposure. The open frame center section is not just for looks. It adds structural rigidity while reducing weight, so you get a stiff arm that does not weigh down your rig.

This arm is compact enough for travel but long enough to give you useful separation between your camera and lights. Use it to position a strobe away from your lens to reduce backscatter, or extend a video light to the side for dramatic side lighting on reef subjects. You can also connect multiple arms together using standard ball clamps to build longer or more complex configurations.

The arm works with virtually any underwater photography system that uses the common 1 inch ball mounting standard. This includes most trays, handles, light mounts, and accessory arms from popular dive brands. Just check that your housing tray or clamps have the standard size ball socket.

Three different type options are available to accommodate various mounting hole positions and orientations. Choose the one that best fits your existing setup.

What's in the box? One double ball arm. Your camera housing, lights, strobes, and tray are sold separately.