The Frameworks ID Speaker Sub Pole features a pistol driven height adjustment using the "Lift-EEZ" piston. Its compact cylinder design has easy one handed CAM operation and adjusts from 37 to 57 inches. It has traditional sub mounts with an integrated adapter for threaded M20 mounts. Ideal for use with speaker cabinets between 35-40lbs with total weight capacity of 70lbs. Works great with: JBL VRX915S, VRX918S, SRX718S, PRX615S-XLF, PRX718XLF, PRX400, PRX600, PRX700, STX800, VRX900QSC KW181, KSU