Material: Aluminum alloy CNC machined, lightweight and durable. Function: Securely mounts your action camera to a helmet. Compatible: Universal fit for GoPro, Coyote, YI, GITUP, and other sports cameras. Easy Installation: Includes gaskets; no additional tools required for setup. Portable: Compact helmet base adapter, easy to carry; ideal accessory for hands-free photo and video capture. Specifications: Material: Aluminum alloy Color: Black Size (L x W): Approximately 46 x 40.5 mm (1.81 x 1.59 inches) Package Includes: 1 x NVG Helmet Mount 1 x Adhesive Pad 2 x Plastic Gaskets Note: 1. Due to lighting and screen differences, the actual color may vary slightly from images. 2. Allow 1-2 cm variation due to manual measurement.