Rockville RVSSA1 Universal 35mm Mounting Tripod Pole Speaker Adapter Bracket Rockville RVSSA1 Universal 35mm Speaker Pole Adapter Bracket. Add a speaker stand mount to a PA Speaker. Mounting pole diameter: 35mm (1.375&quot;). Length - 5.9&quot;. Width - 4.7&quot;. Bracket is constructed from tough durable plastic. Adjustable lock nut secures bracket to the pole. 4 lag screw holes to secure the bracket to the PA Speaker. Hardware not included.