Perfect Compatibility: The ball bearings of the hose can be rotated and replaced, perfect fit for Polaris 180 280 380 480 3900 pool cleaner Part number: D20, D-20 (Note: Not suitable for pool cleaner Polaris 360). Improved quality: The pool cleaner hose is made from high quality materials and has undergone rigorous testing by the manufacturer to prevent leaks. To connect 2 supply hoses together, 2 hose nuts and 1 hose swivel are required. Troubleshooting: 1) Rotation wear. 2) Part of the joint is leaking. 3) The pipe becomes stiff and cannot rotate freely. Installation Tips: The arrow always points in the direction of water flow. Water flows from the wall fittings through the hoses to the Polaris pool cleaner. The end of the hose can be softened by dipping the end of the hose into a container (pot or large insulated coffee mug) of actual hot water, making it easy to push into the device. < p>Easy installation: The pool cleaner hose is easy to install, quick to connect and saves time and money. Pool robot - Connection set with pool cleaner Polaris 280, 380, 180 swimming pool, the D20 swivel hose and the D15 hose nut swivel hose Connector Specification: Name: Pool cleaner hose < p>Material: ABS Packing list: 1 * Pool cleaner hose 2 * Hose nuts Notes : 1. Pool cleaner hoses are not compatible with Polaris 360 pool cleaners. < p>2. Due to lighting effects and shooting angles, there will be color differences in the product, please understand. 3. Due to manual measurement, there is a tolerance in product size.