Will fit most inflatable boats, river rafts and kayaks. [Two Methods]: This pvc boat valve has two inflating methods, one is to inflate when the spring in the middle of the valve does not out; The other is to rotate the operating lever in the middle of the valve to make the shrapnel fully open, no matter which method, be sure to tighten the air nozzle cover and air nozzle to prevent air leakage after the air chamber is full QUALITY MATERIAL: The boat air value is made of the highest quality PVC material, sturdy, anti-corrosion and . And the fine design with a valve ensures anti-leak inflation. Easy to Operate-The valve is easy to inflate and deflate. Double seal leakage It has excellent air leakage performance. Guarantee-If you are not satisfied with the received our products, you can send us an email at any time. We will reply you immediately and help you solve the problem., Manufacturer: ZJchao