1. The tripod mount ring support base is tailor-made and compatible with Nikon Nikkor Z 70-200mm f/2.8 VR S, Z 100-400mm f/4.5-5.6 VR S, and Z 400mm f/4.5 VR S lens, can't be used for other lenses; | 2. The lens collar foot adopts original structure design, the appearance is improved, and the extension function is added. Including wave-shaped handle, screw holes at both ends, petal-shaped locking knob; | 3. The tripod collar stand bottom is added 85mm long Arca fit quick release plate feature, can be used with 39mm Arca-swiss fit tripod ball head, panoramic head and clamp directly; more practical than lens collars without QR-Plate.The Lens collar base bottom reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screws for fixing lens to tripod directly. | 4. If you use a teleconverter, it is recommended to purchase the IS-TB01 telephoto bracket to protect the lens mount; if you want to use it for the Manfrotto fluid head, it is recommended to purchase the IS-3950PRO quick release plate converter separately; | 5. The tripod mount ring base is made of Aviation Aluminum, CNC precisely machined, hollow-out weight reduction design, polished and surface anodized finish. The appearance and exquisite workmanship are much better than similar products made by mold.