Dundas Jafine LC4WZW ProVent White Exhaust Cap, 4-Inches UV resistant coating Paintable formula Measures 4 inches 4" Connection Universal replacement for 4" Duct caps Can be used on dryer, Bathroom or most all 4" applications 3 louver damper system helps prevent cold air, snow and rain from enetering building Paintable to match home exterior 4" Connection Universal replacement for 4" Duct caps Can be used on dryer, Bathroom or most all 4" applications 3 louver damper system helps prevent cold air, snow and rain from enetering building Paintable to match home exterior