PULUZ Dual Handle Aluminium Tray Stabilizer with 4 x Dual Ball Aluminum Alloy Clamp & 2 x 7 inch Floating Arm & 2 x Ball Head Adapter for Underwater Camera Housings Dual Ball Clamp 1. Made of hard coat anodizing aluminium, durable to use. 2. Standard clamp used to attach two arm, base adapters and strobes together. 3. A hard anodized aluminum wing nut allows for easy one-handed operation and will withstand years of use. 4. This standard clamp attaches two 1-inch diameter balls. 5. Thicker plates provide the great combination of strength and range of motion. Plates are spring-loaded for easy assembly and breakdown of your arm system. 6. Size: 6.3 x 5.5 x 2.5cm 7. Weight: 60g Tray Holder 1. Made of high quality aluminum material, durable to use. 2. Underwater tray is used as a support platform for your underwater housing. 3. It is a sturdy platform for mounting underwater videostrobe lights by attaching arms to 1 inch ball mounts. 4. Underwater tray has a 14 inch screw, which are standard for majority of underwater housings. 5. Suitable for majority of underwater housings produced by any manufacturer. 6. This double camera tray is lightweight and will work with almost any camera and video light combination (Some will require an additional adapter). The underwater tray will allow mounting any type of video light. Floating Arm 1. Made of high quality carbon fiber aluminum material, durable to use. 2. Lightweight, highly durable double ball design. 3. Constructed from carbon fiber aluminum tubing with ball ends press fit and glued in trapping air to keep the arm buoyant. 4. This particular arm is ideal for both macro and wide-angle photography. 5. Ideal for shooting water-activities photos, or diving under water 100 meters. 6. Size: 17.7x2.5x2.5cm Ball Head Adapter 1. Designed with small and lightweight, it is fit for GoPro series action cameras, you can store it in the pocket. 2. There is a o ring on the surface which is non-slip and will not easily slide. 3. You can fix it on the divi