Perfect Compatibility: The hose ball bearing swivel can be rotated and replaced, which is suitable for Polaris 180, 280, 380, 480, 3900 pool, replacement part number: D20, D-20. Quality: The pool cleaning hose is made of high-quality materials and has been rigorously tested to prevent leakage. To connect 2 supply hoses, 2 hose nuts and 1 hose swivel are required. Solves Problems: The hose ball bearing swivel can be rotated and replaced, solves the problem of hose hardening and water leakage after long-term use, and also provides rotation to make operation more efficient. 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. Immerse the end of the hose in a container (pot or insulated coffee mug) containing hot water to soften it, making it easier to slide on. Package: 3 * Pool Cleaning Hose 6 * Hose Nuts Specification: Item Type: Pool Cleaning Hose Swivel Nut Kit Material: Plastic Weight: Approx. 31g/1.1oz Swivel Size: Approx. 8.9 x 1.2 x 1.8cm/3.5 x 0.5 x 0.7in Nut Inner Diameter: Approx. 20mm/0.8in Purpose: Pool Cleaning Suitable: For 280 3900 D20 D15 Hose Swivel Nut Replacement Package List: 6 x Nut 3 x Swivel