Features: Ulanzi PT-10 is a gimbal balance counterweight. Made of high quality aluminum alloy, very durable, not easy to break. Only compatible with DJI Osmo Mobile 3 / OM 4 handheld gimbal stabilizer, adjusting balance. When the phone is only connected to the camera lens, one side will be too heavy. The item solves the problem of one side of the phone being overweight. Specifications: Model: PT-10 Material: Aluminum alloy Color: Silver Compatibility: Compatible with DJI Osmo Mobile 3 / OM 4gimbal stabilizer Item Size(1pc): 1.5 * 1.3cm / 0.59 * 0.5inch (Height * Diameter) Item Weight: 20g * 3 Package Size: 7 * 5 * 3cm / 2.8 * 2 * 1.2inch Package Weight: 70g / 2.5oz Packing List: 3 * Ulanzi PT-10 Gimbal Counterweight