1.25 inch INNER DIAMETER 36 inches long (3 feet) Compatible with Summer Waves 600 GPH pumps and other systems that use 1.25" diameter hoses 1.25" x 3' Plastic Return or Suction Hose. Fits the following Summer Waves pumps: F400, F600. Plastic hose guides water from the pump back to the pool, or from the pool into the pump. (Previously known under the part number: 063-060032). This will not fit pool filter systems that require a larger diameter 1.5" hose.