The SSA45 Adapter provides an effective solution to eliminate speaker wobble. Simply attach the adapter to your favorite On-Stage Stands speaker stand then mount your speaker as usual. A manually activated ring controls sliders that expand to fill the gap between the pole and the speaker?s insert reducing the degree of wobble from wind sound or audience vibrations. Your speaker will stand straight giving you peace of mind and adding a professional look to your set up. Fits on 1-3/8? stands and mounts to any speaker cabinet with an integrated pole mount. Weight Capacity: Determined by speaker stand Construction: Steel tubing plastic pressure pads