Features: Engineered exclusively for K3/K4 helmets, this base adapter delivers a perfect wobble resistant fit with easy installation and adjustability using reinforced ABS material. Features snap on compatibility for multiple visors attachments, high impacts ABS construction doubling durability, and vibration proof stability. Designed for motorcycle commuters, riders, and enthusiasts needing quick lens swaps during long rides or extreme weather conditions. Performs reliably during highway cruising, trail adventures, and urban traffic with secure locking mechanisms that prevent dislodging on bumpy surfaces. Combines shock absorption with ergonomic angle customization, ensuring visibility whether navigating tight corners or open highways. Specifications: Material: ABS Applicable Model: for K3 K4 helmets Package Includes: 1 Set Face Shield Visors Base note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.