Water Management Mount Blocks and Vents This 6” x 6.5” (not including trim ring) MountMaster® Mount Block has built-in water channels to divert water to the front face of the siding and help eliminate moisture retention in the home’s exterior. Listing Back To Top Design Visualizer Previous Next Design Visualizer CADdetails™ You need to be logged in to view & download files. Login/Register New to CADdetails? Register to enjoy full access to unlimited 3D models, CAD drawings and specifications. It's free! Downloads Architectural Product Information About Specs Media CAD Toolbar CADdetails™ Download All Manage & Share Website Share Add to Project Favorite User Feedback