For mounting where installation is within 15° of vertical. Angled drainage ramp molded on 1" spigot promotes drainage without having to make angled cuts in the hull. The ports can then be thru-bolted, which is impossible to do in windows where an angled spigot extends below the bolt holes. Constructed of strong ABS plastic with clear Lexan windows. Trim rings and screens are included. Beckson’s patented cam latches secure the window. Use only 100% silicone caulk for installation.