Obstruction-free Cable Management Rather than having a bolt that runs through the pipe and blocks cable access, we use our unique system which leaves cable access clear – even for a bigger or greater qty of cables.Extends up to 1500mmThe dual poles extend Multibrackets Projector Mount Pro HD from the ceiling and extends up to 1500mm. The two poles is individually 500mm long and can be combined. When mounted together, the extension pipe is 1500mm long.The fixed pole has greater rigidity than telescopic mounts.