Good MaterialThe valve adapter features a strong and durable structure with a long service life. The rubber provides excellent airtightness, and the sealing material is copper for reliable anti-leakage performance, ensuring safe use. Fast InflationThis air valve adapter allows a standard air cylinder to connect directly to the board, enabling full inflation in 5 to 10 minutes. (Time may vary depending on the air pump speed.) No special board air pump is required. Lightweight and PortableThe portable valve adapter is easy to carry and eliminates the need to bring multiple types of inflation tools. Dimensions: 7.8 x 3.4 cm. Universal UseThis SUP valve adapter fits most inflatable boats, river boats, canoes, kayaks, paddle boards, and other inflatable watercraft. Ideal ToolAchieve inflation without bulky equipment, saving you time and effort. Note: All measurements are manually taken. Please allow 13 cm variance. Due to lighting and display differences, slight color variations may occur. The actual product may differ slightly from the image.