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: - Screw connector fits inflatable boats, canoes, and similar watercraft - Tip connector fits swimming rings, floating mats, and similar inflatables - Circular connector fits inflatable beds and inflatable pools - Square connector fits SUP paddle boards and similar boards Compatible With: Paddle boards, canoes, rubber boats, inflatable boats, inflatable pools, floating mats, inflatable beds, and other inflatable water products Features: - Easy to operate, carry, and install - Constructed from high-strength nylon and aluminum alloy for durability - Provides strong sealing performance with leak-proof design - Compatible with standard air pumps and bicycle pumps - Stable structure with reliable performance and long service life Assembly Required: Yes, use with air pump