Mosmatic Ceiling Boom Dual PoleDescription When I was planning out my wash bay, I really wanted to add a boom pole so I'd be able to just walk around whatever car I was washing and not drag a pressure washer hose all around. I ended up ordering a Mosmatic Boom Pole and mounting it in the center of my wash bay. It has one of my favorite features of the OG wash bay. This is a similar version to the one in my wash bay but with two poles: the top pole being longer than the bottom pole.