Catch Basin Insert, Removes Debris, Hydrocarbons, Oils, Sediment, Trash, Flow Capacity 500 gpm, Length 24 in, Width 36 in, Height 21 in, For Use With Drains Ranging From 16 x 20 in to 28 x 36 in, Oil Capacity 0.23 gal, Material Non Woven Geotextile Fabric