Made of quality PA material and equipped with sealed ring, sturdy, long lasting and airtight.8 holes, easy to inflate and to deflateFilter Screen at the bottom prevents the foreign matter getting inside Comes in three parts: an inside part, an outside part and valveTriangular valve cover with line, beautiful and practical, not easy to lose.Suitable for most inflatable boats, rubber boats, surfboards, kayaks and canoes, dinghy rafts, etc. Specification: Material: PA Size Chart: 6.3cmx4.3cmx5cm/2.48inchx1.69inchx1.97inch Package Includes: 1 Piece Inflatable Boat Air Valve(4 Pack) 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 on-line shopping!