Heng's Jensen Roof Vents Garnish White 1-1/2 inch are standard injection-molded vents. Plastic lid, plastic base with radius corner, screen, frame, plastic garnish with radius corners. easy installation, dependable operation, leak-proof lid, weather-tight frame and removable screen. Translucent lid colors conform to federal requirements. Standard metal base on galvanized metal lid model. 14 inch x 14 inch vents. Fits roof thickness 1 inch to 2-9/16 inch. Individually boxed.