3-Snap Motorcycle Adapter Half and 3/4s Lens Base Universal Black: Fits for most 3-snap of motorcycle half helmets and 3/4 helmets. for open and close shield, effectively block ultraviolet. Made of high quality plastic, sturdy and durable. Direct replace the old or broken flip up base. Easy to install, no modification needed. Specification: Material: Plastic Type: Helmet Flip Up Base Size Chart: 160MM/6.30inch Package Includes: 1 Piece Helmet Flip Up Base 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! Clear: Fits for most 3-snap of motorcycle half helmets and 3/4 helmets. for open and close shield, effectively block ultraviolet. Made of high quality plastic, sturdy and durable. Direct replace the old or broken flip up base. Easy to install, no modification needed. Specification: Material: Plastic Type: Helmet Flip Up Base Size Chart: 160MM/6.30inch Package Includes: 1 Piece Helmet Flip Up Base 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!