Neewer 2PCS Ultra Reach Carbon Fiber Extension Bar with One Converter Switch for Feiyu G4/G3 3-Axis Handheld Gimbal COMPATIBILITY: It is used with G4 or G3 Ultra Hand Held Gimbal for GoPro Hero 4/3+/3. Ultra extension bar for a wider and higher view EXTENSION BAR: Length is 15 inches / 37 centimeters with diameter 0.9 inches / 2.3 centimeters; Using spiral connection, the extended length can be flexible chose, helping you easily take a different visual LIGHTWEIGHT AND DURABLE MATERIAL: Made of lightweight and strong carbon fiber, it is portable to carry around EASY-TO-USE DESIGN: Simple set-up design allows you to extend your SwiftCam gimbal without limitation according to your specific needs FLEXIBILITY BAR: It is flexible to use just one or both of the extension poles according to your own requirement