General description The Pool Winterizing Plugs are designed for effective winterization of SPA pools and hoses. Made from premium quality sturdy rubber and featuring stainless steel wing nuts, these plugs provide a reliable seal to prevent water from entering the pipes during winter, protecting nozzles and drainage openings from frost damage. Technical specifications Diameter: 38 mm (1.5 inches) Material: Rubber with stainless steel wing nuts Usage Easy to install and remove Prevents water flow into pipes during winter Suitable for pressure testing and pool hose maintenance