This Ventline Roof Vent Trim Ring is for use with radius corner vents. Specifications•Compatibility: 14-1/4 Inch X 14-1/4 Inch Roof Ventadome•Depth (IN):4-1/8 Inch•Color: Polar White•With Corner: Yes Polar White | Ventline Roof Vent Trim Ring, 14"x14", Polar White