Size information - The hose adapter type-A can be attached to a male thread with an outer diameter of approximately 2 3/8 inches and can wrap around a 1 1/4 or 1 1/2 inch hose.Type-B hose adapters are used to connect female threads with an inside diameter of approximately 2 3/8 inches, or wrap around a 1 1/4 inches hose.Please check the size before ordering.Packing lists - The pool hose adapter kit 2pcs type-A replacement hose adapters,2pcs type-B replacement hose adapters,2pcs stainless steel adjustable hose clamps,and 2pcs hose rubber washers,sufficient quantity can meet your applicable and replacement needsWidely used-These hose conversion adapters are compatible with intex 4000, 2500, 2000, and 1500 GPH filter pumps,help to solve the problem of mismatched hoses and filter pumps easily,provide secure and reliable connections.Premium materials -Hose conversion adapters made from high-quality material, durability and sturdy, there is no need to worry about leakage during use.Easy installation-Simply connect the hose adapter to two different sizes of plunger valves or filter pumps, and then tighten the screws. Please note that the screws on the hose clamps need to be operated using tools.Type-A hose adapters and Type-B adapters can be used together or separately depending on your needs.