Feature: 1. Compatibility: Specifically designed for Action4, this filter adapter ring allows your camera to be compatible with 49mm round filters, eliminating the need for multiple filters. 2. Unlock Your Creativity: With the ability to support multiple filter stacking, this filter adapter expands the imaginative possibilities for your photography endeavors. 3. Secure Safety: Equipped with non slip rubber pads and snap on fastening, the adapter features protective rubber pads between the adapter and camera lens to prevent scratches. 4. Enhanced Durability: The sturdy frame of the lens adapter ring enhances light transfer and defends the lens without causing discomfort. 5. Aluminum Alloy Materials: Crafted from aluminum alloy metal, the filter adapter ring boasts a refined and smoothly finish, with the high strength and toughness characteristic of aluminum alloy materials. Specification: Item Type: Filter Adapter Ring Material: Aluminum Alloy Size: Approx. 49mm / 1.93in Application: for Action4 . Package List: 1 x Adapter Ring