This storm drain inlet guard has a flow capacity of 20 GPM and helps remove oil, sediment, trash, and debris. It has an oil capacity of 4.5 gallons and measures 120 inches length, x 12 3/4 width. It is blue and made from polypropylene geotextile. For use with storm drains, culverts, stockpile perimeters, roof drains, downspouts, and trench drains