Features: <br> <br>Suitable for Canon EF 70-200mm f/4L USM, for Canon EF 70-200mm f/4L IS USM, for Canon EF 300mm f/4L USM, for Canon EF 400mm f/5.6L USM. <br>Aluminum alloy construction, anti-rust and lightweight, durable to use. <br>Easy to install with a fixing screw stud and convenient to use. <br>It helps you fix and balance your tele lens which is heavy or long hanging off the front of camera. <br>Nice accessory for photography lovers, bringing you better shooting experiences. <br> <br>Specification: <br>Condition: 100% Brand New <br>Material: Aluminum Alloy <br>Color: Shown as pictures <br>Base Mount Interface: UNC 1/4inch <br>Diameter: Approx. 7cm / 2.7in <br>Inner Diameter: Approx. 6.5cm / 2.5in <br>Weight: Approx. 122g <br> <br>Packing List: <br>1 * Lens Tripod Mount Ring <br>Other devices on pictures are not included.<br>1、Suitable for Canon EF 70-200mm f/4L USM, for Canon EF 70-200mm f/4L IS USM, for Canon EF 300mm f/4L USM, for Canon EF 400mm f/5.6L USM. <br>2、Aluminum alloy construction, anti-rust and lightweight, durable to use. <br>3、Easy to install with a fixing screw stud and convenient to use. <br>4、It helps you fix and balance your tele lens which is heavy or long hanging off the front of camera. <br>5、Nice accessory for photography lovers, bringing you better shooting experiences.