Diversitech 230-B3L Mounting Bracket is a large 21" high end air conditioner mounting bracket. Used for supporting condensing units, type 3 brackets (just like type 2 brackets) feature a cross bar that is attached to a wall, and two L-shaped brackets that are hooked and bolted into place on the cross bar. The condensing unit is mounted onto the L-shaped brackets, and fastened using the bolts and antivibration washers provided. The type 3 bracket features an innovative locking mechanism called Easy-Fit. Easy-Fit enables the arms to be joined to the uprights in a matter of seconds. A spring-lock automatically secures the joint, preventing the arms from being dislodged accidentally. All brackets are furnished complete with an integral bubble level to make correct installation of the crossbar easier.