Specification Brand : Yunir BulletPoint1 : COMPATIBLE LENSES: Designed for Z lenses 70‑200mm, 100‑400mm and 400mm lenses, it can be perfectly compatible with these lenses and ensure solid support. BulletPoint2 : ADJUSTABLE: The bottom 95mm quick release plate is equipped with 1/4 inch and 3/8 inch screw holes and stainless steel non slip screws to adjust the position of the lens and tripod. BulletPoint3 : EASY INSTALLATION: The installation process is very simple, just slide the lens into the base slot and then turn the knob to fix it, convenient and efficient. BulletPoint4 : QUICK MOUNT PLATE: The for quick mount plate allows the lens to be mounted on a tripod, ball head, clamp, or panoramic tripod head for increasing flexibility. BulletPoint5 : HOLLOW DESIGN: The base is CNC precisely machined, with a hollow and weight saving design, polished and anodized to provide stable support for the lens. ItemName : Tripod Mount Ring Base, Aluminum Alloy for Quick Release Plate Lens Collar Replacement Foot for 70?200mm 100?400mm 400mm Lens ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 14 centimeters ItemPackageDimensions_Width : 8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : tripod-lens-mount-rings Manufacturer : Yunir ModelName : Yunirka1ywuxpnb ModelNumber : Yunirka1ywuxpnb NumberOfItems : 1 PartNumber : Yunirka1ywuxpnb ProductDescription : Specification: Item Type: Tripod Mount Ring Base Material: Aluminum Alloy Weight: Approx. 141g / 5oz Applicable : For Z Lens 70-200mm, 100-400mm, 400mm