M-D Building Products 7039 Seal-O-Matic 0 Automatic Door Sweep, 36 in L, Aluminum, quot M-D Building Products 36-inch Seal-O-Matic aluminum door sweep All season protection against drafts, moisture, dust and insects Sweep automatically raises when door is opened to clear carpet or tile and seals gaps up to 1/2-inch high Provides water and sound proof protection 2-3/8-inches high by 36-inches long