- High-Quality Construction: Crafted from premium ABS plastic, our air valve cap is designed for high density, strength, and durability, ensuring it withstands corrosion and everyday use. - Secure Cap Design: Features a sealed air valve cap that effectively prevents leaks during inflation. The threaded parts are precision-sized: the top has a diameter of 22mm (external) / 17mm (internal), while the bottom measures 22mm (external) / 20mm (internal). Confirm compatibility with your valve plug before ordering. - Enhanced Leak Protection: The bottom of the air plug is equipped with a specialized rubber pad that offers superior leak resistance, ensuring safer operation. The one-way inflation valve allows for quick inflation, saving you time and ensuring order. - Fast Inflation and Deflation: Designed to fit openings approximately 20mm in diameter, this Boston valve enables rapid inflation and deflation. Its user-friendly installation and reliable performance guarantee a long service life, perfect for various applications. - Practical Applications: Ideal for inflating sports equipment, pool floats, and air mattresses, this versatile valve cap meets diverse needs. Whether you're preparing for a day at the beach, a camping trip, or sporting activities, this product enhances convenience and performance. Keep your setup efficient and leak-free with our high-quality air valve cap, engineered for reliability and ease of use.