Culligan WBA HD950 Mount Bracket Culligan WBA mounts whole house water filter housings securely to the wall Eight screws are included with the Culligan WBA mounting bracket. The screws are 5/16" x 1-1/2" The Pentek WB-SS or Culligan WBA mounting bracket can be used with No.10 Big Blue or No.20 Big Blue whole house housings The Culligan WBA mounting bracket is a single water filter housing bracket for Big Blue and Big Clear whole house housings. Culligan WBA mounts whole house water filter housings securely to the wall. Eight screws are included with the Culligan WBA mounting bracket. The screws are 5/16" x 1-1/2". The Pentek WB-SS or Culligan WBA mounting bracket can be used with No.10 Big Blue or No.20 Big Blue whole house housings. The Culligan WBA bracket is made of zinc coated steel.