Junior plenum equipment enclosure is an enclosure for equipment that needs to be installed above the ceiling tiles. Made of lightweight fireproof aluminum exceeding the requirements of UL® 2043. Perfect for electricians And I .T installers. In fact anyone who requires equipment to be installed above the ceiling space will find it is extremely easy to attach the Junior equipment enclosure to any Unistrut® type channel/strut or to any 1 1/2" dia pole. The new double pole mount fitting allows easy connection to a projector or other device using (2) 1 1/2" dia poles.