This Frameworks series adjustable subwoofer speaker pole fits traditional 1-3/8�� and threaded m20 subwoofer pole mounts. It includes removable adapter for threaded m20 mount with a minimum/maximum height of 35�� to 60�� and a 125-lb. weight capacity. Features include an all-steel construction, built-in safety pin, easy-grip tension knob height adjustment. This Standard Speaker Sub Pole ships in signature Frameworks retail-friendly packaging.