Lake Screen 4" For Pumping From Lake - Canal - Pond - River - Stream #CSS4B Lake/Canal Screen For Pump Intake Made Of Durable PVC And Aluminum For Long Life Can Be Easily Disassembled By Hand To Clean Inside And Out Rated At 150 Gallons-Per-Minute. 60 Square Inches Of Open Air 1/8" Round Perforated Holes For Maximum Flow