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 video/strobe lights by attaching arms to 1 inch ball mounts. 4. Underwater tray has a 1/4 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. 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. Package List 1. Dual Handle Tray Stabilizer x 1 2. Ball Head Adapter x 2 3. Color Package Box x 1