Item Type: SUP Valve Adapter Material: Nylon + Aluminum Alloy Color: Black + Red Product Category: Surfboard Accessories Applicable Users: Adults Circular Connector Size: Approx. 3.6 cm / 1.4 in, Nozzle Inner Diameter: Approx. 1.2 cm / 0.5 in (manual measurement, allowable error 1–2 mm) Screw Connector Size: Approx. 4.6 cm / 1.8 in, Nozzle Inner Diameter: Approx. 1.7 cm / 0.7 in (manual measurement, allowable error 1–2 mm) Tip Connector Size: Approx. 6.3 cm / 2.5 in, Nozzle Inner Diameter: Approx. 0.7 cm / 0.3 in (manual measurement, allowable error 1–2 mm) Product Size: Approx. 10 cm / 3.9 in (size of square connector installed on the valve adapter) (manual measurement, allowable error 1–2 mm) Gas Nozzle Function Description: - The screw connector is suitable for inflatable boats, canoes, and similar watercraft. - The pointed connector is suitable for swimming rings, floating rafts, and similar inflatables. - The circular connector is suitable for inflatable beds and inflatable pools. - The square connector is suitable for stand-up paddle boards (SUP). Compatible With: Paddle boards, canoes, rubber boats, inflatable boats, inflatable pools, floating rafts, inflatable beds, and other inflatable water products. Usage: Designed to be used with an air pump or standard bicycle pump. Features: - Simple operation, easy to carry and install - Constructed from high-strength nylon and aluminum alloy for durability - Strong, leak-proof seal with reliable performance - Compatible with most common inflatable water sports equipment - Stable structure with long service life