Features: Accurate focusing, with an auxiliary focusing rings providing larger and more accurate focusing adjustment, allowing the photographer to easily obtain clear focus. Easy to install, well-designed, suitable for various lenses and cameras, users only need simple operate to complete the installation. Helps to improve creative efficiency, effectively shorten focusing time, help photographers focusing on composition and creativity, and enhancing overall photoshoots efficiency. Durability ensuring good performances even after long-term use and withstand frequent adjustment operations. Lightweight design, without adding extra burden to the device, easy to carry and use, suitable for various photoshoots environments. Beautiful and elegant, with a simple yet modern exterior design that can be paired with various lenses to enhancing the overall visual effect of the device. Specifications: Component: silicone Size: Small, M, L (optional) more detail size please refer to pictures Package Includes: 1Pc Lens Focusing Circlet note: Other accessories demoed in the pictures is not included. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.