With its modular construction Pro Series parts have vast possibilities to change, update and reconfigure a Pro Series installation. Combine the parts with a Pro Series installation and create a new configuration.M Internal Pole Joiner – Internal Pole Joiner, Part for Pro Series, steel, 2 pcs – blackThis part number is also shiped with:M External Pipe Cover – External Pipe Cover, cover joint gap between 2 extension pipes, blackMB Pro Series is design protected by Multibrackets