The black 21356 Distance Rod with Pneumatic Spring from K&M is a steel tube combination used to connect satellite systems. It has 5 height adjustable positions, between 40.4 to 60.8". This rod features a redundant securing system, with a clamping screw and locking pin. The integrated 37.5 lb pneumatic spring is designed to ease the extension and retraction of the loudspeakers. The distance rod end is in the form of a peg, designed to make is easier to mount and remove the loudspeaker.