Dundas Jafine BPGH4WZW 4" White Hood Cammed louvers easily pivot to help prevent sticking. Low profile pest guard can be easily removed for cleaning. Snap on aluminum pipe to cap assembly eliminates the need for lint trapping staples Can be painted to match the home exterior. UV resistant plastic protects cap from harmful effects of the sun Designed to snap on/off j-channels for ease of installation and replacement