About this item Perfect compatibility: the ball bearing of the hose can be rotated and replaced, which is suitable for the pool cleaner 180, 280, 380, 480, 3900, Replacement Part Number: D20, D-20. Quality Enhancement: The pool cleaner hose is made from high quality materials and has been rigorously tested to prevent leaks. To connect 2 supply hoses together, 2 hose nuts and 1 hose swivel joint are required. Solve the problems: the ball bearing of the hose can be rotated and replaced, solves the problem of hardening from the hose and water leakage after a long time of use, and also provides a rotation function to make the operation more efficient Installation tips: The arrow always points in the direction of the the flow of water. Water flows from the wall fixtures through the pipes to the cleaner. Polaris. Dip the end of the hose in a container (jar or large insulated coffee cup) of hot water to soften it, which makes it easier to slide. Packing list: 1 * hose cleaner pool 2 * pipe nuts,