New Pig Corporation's PIG Drain Insert Plus helps to keep hydrocarbons and sediment from entering the water system. Use as a best management practice and part of your stormwater prevention plan. Fits rectangular storm drains up to 30" x 40". Fits round storm drains up to 30" diameter. 18" deep accumulation pocket collects contaminants. Filter strips remove floating oil and other hydrocarbons. Visit www.newpig.com.