Excellent Quality: Copper+Rubber, Pressure Resistant And Durable, Good Air Tightness. Quick Inflation: Easy To Change, Quick To Inflate, Can Be Inflated In 5-10 Minutes Depending On Pump Speed And Strong Seal Protection. Great Replacement Accessories For Various Kayaks. Easy To Carry: The Air Pump Converter Is Small, Light And Easy To Carry. You Can Even Put It In Your Pocket When You Go Out To Do Of The Boat.Suitable For Most Inflatable Boats, River Rafts, Kayaks, Canoes, Stand-Up Paddles, Etc. Combine Other Tools: This Air Valve Adapter Uses A Standard Schrader Valve Fitting To Couple With An Air Compressor Or A Bicycle Tire Pump. Use The Supplied Extra Thin Washer Or Change The Part Washer With Your Board/Kayak/Boat Valve Cap Washer For A Good Airtight Fit. 100% Satisfaction Guarantee: Dear Friend, We S Appreciated For Your Purchase Of Our Sup Adapter, We Sincerely Hope You Can Get Satisfied Service And High Quality Products From Our Store .Any Problems, Contact Us At The First Time, We Are Always Standing By.Warranty Full Refund Or Free Replacement If You Are Not Satisfied With Our Air Valve Adapter I Wish You A Happy Shopping