Description: Lightweight and : This product is made of quality PVC material, which is lightweight, sturdy. It has a long service life.Easy to Use: The design of this product is simple and convenient to use. It can be easily installed on your inflatable boat or surfboard.Stainless Steel D ring: The D ring is made of stainless steel and fixed on the patch. It comes with an elastic and flexible rubber latex core bungee cord for attachment.Wide Application: This product is suitable for PVC inflatable boats, rafts, small boats, kayaks, canoes, SUPs (Stand Up Paddleboards), and surfboards.Product Details: Each package includes 4pc of the product with dimensions patch diameter 8cm/3.15inch. Specification: Material: NylonDiameter: 8cmx8cmx1.8cm/3.15inchx3.15inchx0.71inch Package Includes: 4 D Ring Patches Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful online shopping!