Ultra-Long - The overall length of this arm is 18.3INCH (465mm), making your device closer to you and viewing information more clearly. Superior Compatibility - Attaches to any 1.5 inches / C size / 38mm ball component, including mounting bases and device holders. All of our components are compatible with FOR RAM Mounts, FOR Arkon, FOR iBolt, and other 1.5 inches / C size / 38 mm ball systems. High Quality - Constructed of high-grade aluminum and high-performance composites, this mount offers a rock solid hold without adding more weight.Strong load-bearing capacity (can carry 3KG of electronic devices in a stationary state, and can carry 1 in a shaking state). Corrosion Resistance - The mount has been Salt Spray Tested for thousands of hours (including stainless steel bolts and springs) to resist high salt environments corrosion. 360 Degree Rotation - The 1.5-inch metal long bracket is sturdy and durable. include a total length of 465mm, an inner diameter of 34mm, and an outer diameter of 38mm. It can be used on various types of ships such as fishing beds, speedboats, and yachts. Specification:A:Normal Color: Black Material: Nylon + Aluminum Alloy Package Contents: 1 x Extension Socket Arm