Description: The repair edge is made of rubber, flexible, anti-aging and durable. Damaged or damaged items are easily replaced. Please clean the rest of the glue before installing new edges. Please pay attention to the size of the item before purchasing. Specifications: Material: 75A Rubber Color: Black; Outer Diameter: 3.3 inches (84 mm); Convex Outer Diameter: 2.9 inches (73 mm); Convex Inner Diameter: 2.4 inches (60 mm); Inner Diameter: 2.1 inches (53 mm); Package Contents: 4 x Rubber Edges.