"ULTIMATE SUPPORT SP90B Satellite Tele-Lock Speaker Pole With M20 Threaded Connection And Standard Subwoofer Adapter || PRODUCT FEATURES :: TeleLock Lift Assist || Adjustable Speaker Adapter || Dual Mode Subwoofer Adapter || Durable Tubing || || PRODUCT SPECS :: Product Name: SP-90B || Part Number: 17681 || Height Range: 39.75"" - 60.375"" || Upper Tube Size: 1.5"" || Lower Tube Size: 1.75"" || Weight Rating: 75 lbs. || Weight: 3.6 lbs. || || SP Series B TeleLock Series Speaker Pole || Original Series speaker poles from Ultimate Support are amazingly strong yet lightweight thanks to their oversized, thick-walled aluminum tubing Original series stands are everything you'd expect from Ultimate Support speaker poles: Strong, sturdy, lightweight, and 100% field serviceable. || || The SP-90B includes the popular TeleLock collar, which gives the user the ability to safely raise or lower the stand WHILE a speaker is on it thanks to the Auto-lock technology that securely grips the telescoping tube in place as you set its height. || || Adjustable Speaker Pole with Tele-Lock Lift Assist Universal Subwoofer Adapter"