Superior Compatibility - The overall length of this arm is 5.9" (150mm). Attaches to any 1.5 inches / C size / 38mm ball component, including mounting bases and device holders. All of our components are compatible with RAM Mounts, Arkon, iBolt and more. Sturdy and Heavy Duty - The weight capacity of the double socket arm can be up to 15.5 lbs at rest and 4.5 lbs at motion. Constructed of Powder-Coated Marine-Grade Aluminum and Stainless Steel Hardware. The mount has been Salt Spray Tested for thousands of hours (including stainless steel bolts and springs) to resist high salt water corrosion. 360 Degree Rotation - Attach 1.5 inches ball accessories for near-infinite adjustability for optimal viewing angle. What You See is What You Get - We are committed to all photos and videos being real product shots, so you can feel the real texture and get the product as advertised. Made of Powder-Coated, Marine-Grade Aluminum for durability and reliability in the most demanding environments. The overall length of this arm is 5.9" (150mm). Attaches to any 1.5 inches / C size / 38mm ball component, including mounting bases and device holders. All of our components are compatible with RAM Mounts, Arkon, iBolt and more.