JBL JBLPOLE-GA Assist Speaker PoleGas Assist Speaker Pole with M20 Threaded Lower End, 38mm Pole & 35mm Adapter. The JBLPOLE GA is the easiest speaker stand to use thanks to the internal pneumatic shock that literally raises the speaker for you. The stands internal shock easily raises speakers weighing 35 lbs and less with no effort from the user. Raise and Lower the Speaker with Ease! Strong and Easy to Use Z knob Incredibly Sturdy Pole M20 Threaded Pole Mount Fits all subwoofers