Features: It is constructed of premium aluminum alloy, sturdy and anti-corrosion, enduring. Compatible for Zhiyun Smooth 4 gimbal stabilizer. There are hot shoe mount and 1/4in threaded holes on each end for the convenient installation of microphone, light or other available devices. It allows your gimbal to mount various photography accessories. Very convenient for your shooting work. High precision treatment and it can be fixed firmly ans stably onto gimbal. Specification: Condition: 100% Brand New and High Quality Material: Aluminum Alloy Color: Black Thread: 1/4" Compatibility: for Zhiyun Smooth 4 Dimensions: Approx. 6 * 6 * 2cm / 2.4 * 2.4 * 0.8in Ring Diameter: Approx. 4.2cm / 1.6in Weight: Approx. 65g Packing List: 1 x Extension Mounting Ring * other devices on pictures are not included. 1、It is constructed of premium aluminum alloy, sturdy and anti-corrosion, enduring. 2、Compatible for Zhiyun Smooth 4 gimbal stabilizer. 3、There are hot shoe mount and 1/4in threaded holes on each end for the convenient installation of microphone, light or other available devices. 4、It allows your gimbal to mount various photography accessories. Very convenient for your shooting work. 5、High precision treatment and it can be fixed firmly ans stably onto gimbal.