Non-powered vent with manual lift lets heat escape without the need for power. Easily installed. Fits 14" x 14" opening. Includes white interior and base, 4-1/2" white interior trim garnish, installation kit with gasket (no sealant), and the new Pop€™n Lock Screen (no fasteners required). 31-2281 is low profile fitting roof thickness of 1- 3/4" to 6" and 31-2103 is high profile fitting 1" to 6". Lifetime warranty.