Rockville RVSSA1 Universal 35mm Speaker Pole Adapter Bracket.
Add a speaker stand mount to a PA Speaker.
Mounting pole diameter: 35mm (1.375").
Length - 5.9". Width - 4.7".
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.