These self-weighted hoses are used to introduce air and oxygen into hauling tanks, culture tanks, lakes, or whenever long flexible diffusion is needed. made of a strong fiber material that will last for years. Operating range 2-6cfm per foot. Comes with a 3/4" Garden hose fitting (A cap on the male end of a 1/4" male adapter on the female fitting) Shipping weight is 1 lb. per foot.