Frameless inlet drain filter allows you to stay in compliance with EPA regulations and protect waterways from oil and sediment. Drain filter inserts protects drains of all sizes, filtering oil, sediment and debris. Frameless design can fit small drains of any shape, including shallow drains; designed for easy handling and exceptional filtration. Easily handle and remove filter with heavy duty, high-visibility straps. Overflow ports help prevent blockage during high water flow. Fits round drains 20" to 30" diameter, fits storm drains 20"-30" wide to 20" - 36" long.