ProX X-SAAMX2PKG Set of 2 Speaker Pole Mounts Adjustable w/BagThe ProX X SAAMX2PKG is a package of 2 T SAA M poles and exactly what you need for your subwoofer speaker PA system plus it comes with a carrying bag for the pair. They are adjustable in height from 32" to 63" and mounts between a subwoofer cabinet with a top mounting hole and a speaker with a bottom mounting hole sized at 1 3 8" (35mm). The T SAA M features both a friction locking knob and a security pin system and is made from durable steel.