This water tube is essential to secure your winter pool cover. Meticulously made of durable components it comes with everything that is required for a full assembly. The accessory is a must-have for an organized pool. Details:8ft. x 11" x 11" deflated0.25" tube height1.25" valve opening diameterDouble heat-sealed seams for extra durabilityMeant to be no more than three-quarters fullLarge valve fits most garden hosesVinylNote: It is recommended that the entire winter cover is held down with water tubes to help prevent the winter cover from falling into the pool