Valterra's Universal Vent Lid replaces Jensen, Ventline, Maxxair (with double lifting arms), Fan-Tastic Vent, Elixir, and Ventadome vent lids. It is constructed of durable impact-resistant polypropylene with rust-resistant mounting hardware. The lids are thicker, heavier, and stronger than the competition. Dimensions: 16" x 15" x 3.5". Limited Lifetime Warranty.