Good MaterialValve Adapter Structure Is Strong And Durable, Long Service Life, Rubber Has Good Airtightness, Seals Material Is Copper, Anti-Leakage, Can Be Used Safely SafetyFast InflationThe Air Valve Adapter Allows The Ordinary Air Cylinder To Connect Directly To The Board, It Fully Inflates In 5-10 Minutes.The Time Is Determined According To The Speed Of The Air PumpThere Is No Need For A Special Board Air PumpLightweight And PortablePortable Valve Adapter Is Easy To Carry, No Need To Carry Different Kinds Of Inflatable Tools, Dimensions: 7.8 X 3.4 CmUniversal Use The Sup Valve Adapter Fits Most Inflatable Boats, River Boats, Used For Various Canoes, Sup, Kayaks, Paddle Boards, Inflatable Boats , EtcIdeal ToolInflation Can Be Achieved Without The Use Of Heavy Inflatable Tools , Which Saves You A Lot Of Time