This extension ring is made of high quality material. Characterized by fine workmanship and all metal construction, easy to install and use. A good choice for you. Features: Made of high quality aluminium alloy material, this product is sturdy and durable. All metal construction, anti-rust and corrosion resistant, enduring and long-lasting for daily use. Comes with three 1/4in screw holes, convenient for you to connect microphone, LED light or other photography devices. Compatible for Zhiyun Plus V2 Crane-M Smooth 3 Smooth 2 Smooth-c Evolution. Lightweight and compact, easy to install and use. Specifications: Condition: 100% Brand New Item Type: Extension Ring Material: Aluminum Alloy Color: Black Screw Hole: 1/4" Compatibility: For Zhiyun Plus V2 Crane-M Smooth 3 Smooth 2 Smooth-c Evolution Dia: Approx. 3.5cm / 1.4inch Weight: Approx. 55g / 1.9oz Package List: 1 * Extension Ring 1 * User Manual 1、?Made of high quality aluminium alloy material, this product is sturdy and durable. 2、All metal construction, anti-rust and corrosion resistant, enduring and long-lasting for daily use. 3、Comes with three 1/4in screw holes, convenient for you to connect microphone, LED light or other photography devices. 4、Compatible for Zhiyun Plus V2 Crane-M Smooth 3 Smooth 2 Smooth-c Evolution. 5、Lightweight and compact, easy to install and use.