Overview Reviews Product Description Friction locking knob adjusts length. Security pin for added safety. Height adjustable from 31 5/8-55 All-steel construction Upper Shaft Tubing: 1 3/8"Lower Shaft: Fits 1 3/8" sockets Weight Capacity: 80 lbs Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × MR DJ Mr. Dj SS50 Adjustable Subwoofer Attachment Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments