describe PERFECT COMPATIBILITY: The ball bearing of the hose can be rotated and replaced, perfect for Polaris 180, 280, 380, 480, 3900 pool cleaners, spare part numbers: D20, D-20 (Note: not suitable for Polaris 360 POOL CLEANER ). Enhanced Quality: Pool cleaner hoses are made of high-quality materials and have been rigorously tested by the manufacturer to prevent leaks. To connect 2 supply hoses together, 2 hose nuts and 1 hose swivel are required. Troubleshooting: 1) Rotational wear. 2) Part of the gasket leaks. 3) The tube becomes hard and cannot turn freely. Installation Tip: The arrow always points in the direction of the water flow. Water flows from the wall fitting through the hose into the Polaris pool cleaner. The end of the hose can be softened by dipping it into a container (a jar or a large insulated coffee mug) filled with real hot water, which will easily slide it into the device. EASY INSTALLATION: Pool cleaner hoses are easy to install and quick to connect, saving time and money. Pool Robot - Connector Assembly with Polaris 280, 380, 180 Pool Cleaner D20 Swivel Hose and D15 Hose Nut and Swivel Hose Connector Specification: Name: Pool cleaning hose Material: ABS Packing list: 1 * Pool Cleaning Hose 2 * Tube Nuts Comment: 1. Pool cleaner hoses are not compatible with Polaris 360 pool cleaners. 2. Due to the lighting effect and shooting angle, the product has a certain color difference, please understand. 3. Due to manual measurement, product size has tolerance. become very rich