Description Description: Material: Made of Marine grade 316 stainless steel, polished ,corrosion resistant and durable. Feature: Corrosion resistance and durability in the seawater environment. Function: Accepts all standard antenna 1-14UNS threads (male) ;Fits all standard 1 marine antennas. Fitment: Fits all standard 7/8 inch (22mm) , 1 inch (25mm) or 1 1/4(32mm) Rail. Easy to Use: The quick action handle makes raising and lowering the antenna easy. Specification: Material: 316 stainless steel Size: Length Approx. 100mm/3.94inch Package Includes: 1 Set Antenna Mount Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!