Premium ABS Material These Boston air valves are made of thickened ABS material, durable, odorless, lightweight, portable, rust-resistant, corrosion-resistant, and resistant to aging, ensuring long-term use. Anti-Leakage Design The bottom of the spiral air plugs features an air cushion design to prevent air leakage, providing a secure fit and reliable performance. Ideal Valve Replacement These anti-leakage air valve bungs offer a practical and economical solution for replacing standard air valves. The screw plug opening measures 20mm (0.78 inches); please verify compatibility before purchase. Quickly Inflate & Deflate Easy to use for quick inflation and deflation (one-way inflation). Simply attach the inflatable boat air valve to the inflation port for convenient operation. Wide Application Suitable for most rubber dinghies, hot tubs, airbeds, inflatable boats, rafts, and other inflatable products. A must-have accessory for water sports enthusiasts. Product Features 1. Fits 20mm (0.78 inch) valve hole. Compatible with most rubber dinghies, hot tubs, airbeds, inflatable boats, rafts, and similar inflatables. 2. Constructed from thickened ABS material for durability, lightweight portability, and resistance to rust, corrosion, and aging. 3. Features an anti-leakage air cushion design for a tight, secure fit to help prevent air loss. Please carefully check the product dimensions and specifications to ensure compatibility with your needs. Detailed information is provided in the title and description. We aim for complete customer satisfaction. For any questions regarding the product, feel free to reach out for assistance. Thank you for choosing this product. We hope you enjoy using it.