General description The Boston Valves 4 Pack features universal one-way air valves designed for a variety of inflatable products including boats, rafts, kayaks, swimming pools, and air mattresses. These valves are engineered for quick inflation and are ideal for replacing standard Boston valves. Technical specifications Material: High-quality ABS Durability: Strong, corrosion-resistant, and leak-proof Bottom diameter of threaded part: 22 mm (outer) / 20 mm (inner) Compatibility and accessories Compatible with most inflatable canoe mattresses, kayaks, swimming pools, and boats Ideal for standard Boston valve replacement kits Usage One-way inflation valve for quick and efficient inflation Sealed design ensures leak-proof inflation