ApplicationThis hose connector is perfect for converting and connecting all 1-1/4-inch (approx. 3.5 cm) and 1-1/2-inch (approx. 3.5 cm) polyvinyl chloride hoses, swimming pool hoses, vacuum cleaner hoses, and filter pump connecting hoses, providing the easiest and most cost-effective method of connection. Leak Proof DesignThe pool cleaning hose is unique in that a ridge is formed on the hose to ensure the connection is simply held in the center for a stronger, leak-free, convenient and practical connection. High QualityMade of high quality material,light weight,strong,fit and easy to install. FunctionThis vacuum hose adapter completely solves the difficult connection between the filter pump connection hose and the pool vacuum hose and reduces the 1-1/2" hose to a 1-1/4" hose, allowing larger pumps to be used for smaller in-ground pools. Dimensions] The widest part of the pool vacuum hose connector is about 1.5 inches (about 3.9 cm), the ends are 1.1 inches (about 2.9 cm) wide and 8.07 inches (about 22.7 cm) long.