1. Using high-density aviation aluminum, automatic CNC machine tools, diamond multi-tool heads, hollow carving precision machining; using vibration polishing technology, the accuracy is 20% higher than manual grinding; using multiple anodization, the metal hardness and uniformity are improved by 20%; 2. Tailored according to the shape and structure of the lens, the switch function is retained, the tripod ring is closely matched with the lens, and the installation position cannot be pasted. 3. The tripod ring adopts an irregular shape, the edges and corners are polished, and the inner wall uses plastic film to protect the contact ; the minimum inner diameter is about 71mm, and the width is about 20mm. There are 1/4 and 3/8 screw holes on the board for expanding the external quick release plate or tripod, and the stainless steel anti-slip screws can be removed. 4. The tripod mount ring is attached to a tripod, and it helps you secure and balance a heavy or long-lens telephoto lens that hangs on the front of the camera. 5. Unique design, can better protect your camera. Applicable lenses: For Z 105mm F2.8 VR S colour: black Material: Aluminum Alloy Package Contents: 1 x Tripod Mount Ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.