The Culligan UB-1 single housing bracket is a "U" shaped mounting bracket for 3/4" inlet/outlet standard whole house housings. The UB-1 mounts standard whole house water filter housings and helps support the weight of the water filter. Screws are included with the UB-1 mounting bracket for securing the water filter housing to the wall. The screws are #10 1-1/2" pan head screws.