Kids' Station Outdoor Sand/Water Trough ExtensionComponents are made of specially formulated recycled HDPE plastic based materials that will not fade, crack, peel or splinter. The easy to clean surfaces never require painting or sealing. Paint, ink, and other substances will not permeate the plastic, which prevents permanent staining. Just clean with any standard cleaner or power wash for a bright crisp look for many years to come! Rust proof Stainless Steel fasteners are used to insure long life