SmallRig Counterweight & Mounting Clamp Kit for Moza AirCross 2 2829 is designed to balance heavy cameras on your gimbal, such as BMPCC 4k and 6K camera. The clamp mounts onto gimbal sidearm with a quick release knob. Featuring four 1/4"-20 threaded holes on three sides and bottom, enabling you to mount and stack counterweights as needed to balance your setup. Integrated with rubber pads inside the clamp to prevent scratching the gimbal. The clamp is made from durable aluminum and the counterweights are made from solid stainless steel. Optional Counterweight 2459(50g), 2284 (100g),and 2285(200g) are provided if needed.