Stable and durable steel tube combination used to connect satellite systems. Height adjustable in 5 positions from 36.417 - 56.89". With spring-loaded bolt and locking screw for secure fit. The integrated 37.478 lbs pneumatic spring makes it much easier to extend and retract the loud-speakers in a controlled manner. The distance rod comes with a mounting aid, which makes it much easier to mount and remove the loudspeaker. M20 threaded bolts are used to attach the 24116 connector plate, this provides a firm fit and absolute vertical position.