UltraTech 9172 Polyester Ultra - Inlet Guard Oil and Sediment Model, 48" Length x 24" Width Keeps dirt, sand, sediment, trash and debris out of drains Quick and easy installation using built-in magnets - no more lifting of heavy catch basin grates Heavy-duty, reinforced material (non-woven, polyester spun) allows up to 192 gallon per square feet per minute Low profile design can be driven over and is unobtrusive to traffic and personnel Measures 48-inches length by 24-inches width