Diameter: 18-1/8 in. Finish: White Primer. Inside Diameter: 3-5/8 in. Fits Canopies Up To: 5-1/8 in. Projection: 1 in. Material: Polyurethane. Brand: Ekena Millwork. Hand Painted Option To choose one of our pre-made finishes: Click Here. For a custom made finish: Click Here.