Features: Replacement lens collar foot exclusively suitable for FE 400 2.8GM /FE 600 4GM telephoto lens, ensuring perfect compatibility and secure mounting. Essential for professional photographers and cinematographers requiring reliable support for heavy super telephoto lens. Optimized for wildlife/sports photography scenario where rapid lens repositioning and stability on heads or panoramic tripods are critical. Enhances with antislip screws and multiple accessory mounting point, this tripod mount upgraded outperforms factory installed counterparts in operational versatility. The lens replacement foot is selected from high-density Aviation Aluminum, lightweight and solid Specifications: Component:Metal Size:Approx.150x43mm/5.91x1.69inch Package Includes: 1Pc Lens Foot note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.