The On-Stage Stands M20 thread sub pole is exactly what you need if you have a subwoofer with an M20 threaded pole mount. Unlike the older 1 3/8" socket design, the M20 concept will eliminate any wobble, making your set up even more secure. The On-Stage Stands M20 thread sub pole also features an all-steel shaft that telescopes from 30"-54" and is secured by a captive steel pin. With a zinc-plated threaded lug at the lower shaft, you get a very durable speaker pole for your subwoofer in the On-Stage Stands M20 thread sub pole.
eBay