Feature:1. This valve adapter come with simple operation, easy to carry and install2. Made of highstrength hard plastic and alloy, possess strong structure, laborsaving, strong sealing, and leakproof3. Suitable for most paddle boards, canoes, rubber boats, assault boats, swimming rings, floating rowing boats, inflatable beds, rowing boats, etc.4. Surfboard accessories, can be used with air pumps, regular bicycle air pumps5. Air pump converter have stable structure, excellent performance and long service lifeSpecification:Item Type: SUP Valve AdapterMaterial: Nylon + aluminum alloyColor: Black + redProduct Category: Surfboard accessoriesApplicable People: AdultsCircular Connector Size: Approx. 3.6cm / 1.4in, Nozzle Inner Diameter: Approx. 1.2cm / 0.5in(manual measurement, allowable error 1-2cm)Screw Connector Size: Approx. 4.6cm / 1.8in, Nozzle Inner Diameter: Approx. 1.7cm / 0.7in(manual measurement, allowable error 1-2cm)Tip Connector Size: Approx. 6.3cm / 2.5in, Nozzle Inner Diameter: Approx. 0.7cm / 0.3in(manual measurement, allowable error 1-2cm)Product Size: Approx. 10cm / 3.9in(the size of square connector installed on the valve adapter)(manual measurement, allowable error 1-2cm)Introduction of Gas Nozzle Function: The screw connector is suitable for assault boats, canoes, etc.The pointed connector is suitable for swimming ring, floating row, etc.The circular connector is suitable for inflatable beds and inflatable pools.The square connector is suitable for SUP paddle boards, etc.Suitable for Use: Paddle board, canoe, rubber boat, assault boat, inflatable pool, floating row, inflatable bed, etc.Assembly Required: Use with air pump and conventional bicycle air pump..Package List:1x Valve Core Wrench1 x Valve Adapter3 x Gas Nozzle