Features 1、Mechanical finish machining workmanship, surface frosted electroplating treatment, with glossy, harden black baking paint, not easy to scratch paint. 2、Internal has protection pad, will not scratch lens body. 3、Suitable for SIGMA four generation APO 70‑200mm F2.8 II EX DG lens. 4、Lens fixed on tripod, can easily rotated in all directions to meet shooting needs. 5、Made of high quality aluminium alloy material, sturdy, durable and long service life. Specification Condition: 100% Brand New Item Type: Lens Mount Ring Material: Aluminium Alloy Color: Black Fitment: For SIGMA Four Generation APO 70-200mm F2.8 II EX DG Lens Quantity: 1PCS Install: Insert from Back of the Lens, Tighten Screws Weight: Approx. 157g Inner Diameter: Approx. 67mm/2.64inch Circle Inner Diameter: Approx. 71mm/2.80inch Circle Width: Approx. 18mm/0.71inch Circle Thickness: Approx. 4mm/0.16inch Package List 1 x Lens Mount Ring