Type I stormwater catch basin insert frame and liner. Fits nominal size 18" x 24" x 24" Deep. Rugged aluminum armature with vinyl coated steel wire frame. Non-woven polypropylene liner with oil and particle capture to 100 micron. Use alone or with other quality Stormwater Supply treatment media, or formulate your own. Contact us for technical support at info@StormwaterSupply.com.