PROVEN EFFECTIVENESS TEST DATA: Test result by Sumika Technoservice Corporation on the effectiveness of one Burrcut Flex Door Sweeps on adult German cockroaches is available. This test result indicates that the Burrcut was highly effective in preventing the passage of adult German cockroaches under the conditions of this test. See more details in our web site. burrtecusa .com MOUNT ON DOOR GAPS TO PREVENT THE INTRUSION OF PESTS A RUBBER FRAME MAKES IT EASY TO CUT TO FIT THE REQUIRED DIMENSIONS 82FT DOOR SWEEP (JOINT-LESS) EASILY MOUNTED WITH SCREWS Door gap prevention in food factories, restaurants, schools, museums, medical supply factories, paper mills, etc.