Colour Family: WHITE Material: METAL/PLASTIC Assembled Product Length: 1" Assembled Product Height: 4" Assembled Product Width: 4" Diameter: 4" . 4" cap with removable pest guard and 4" diameter aluminum pipe Installation instructions included 3 louver damper system prevents cold air, snow or rain from coming into the home UV resistant plastic Easy removal or lint and debris Locks in open position Pest guard can be easily removed for cleaning Keeps birds and pests from nesting in your vent J-channel flange sold separately for use when installing on exterior siding up to 1" thick