Storm Sentinel catch basin inserts are the ideal products for preventing harmful pollutants from washing into storm drains. This framed model comes complete with an adjustable steel wire frame for simple, one-person installation and removal. There are no special tools required for installation. It also sits below the grate, making it low-profile and unobtrusive. The geotextile fabric prevents contaminated sediment from washing into the drain, protecting you from fines and fees.