Avenger D650 Junior Boom Arm with CounterweightAvenger D650 Junior Boom Arm with Counterweight Boom arms allow you to position your lights to reach the most difficult positions. This junior boom arm can support a payload up to 40kg and extends up to 3m. It also includes a strong steel counterweight for smooth operation and stability. Load Capacity at Minimum Extension 163cm: 10Kg Load Capacity at Maximum Extension 300cm: 2Kg Counterweight included: 6. 7kg Max extension 300cm MPN: D650