Threshold tape for entry/patio door premium dual guard roll; Wdth x Lgth= 5.5″ x 25′; Flange acts like a gasket sealing off the sub-floor and preventing air and moisture infiltration under the threshold; Helps keep the door frame from racking and the sub-floor from swelling and warping; Eliminates the need for caulking; Adheres to concrete wood and metal surfaces; Self-adhering 100 percent waterproof mold and mildew resistant; Designed for all entry/patio doors; Exceeds all building codes and manufacturers installation specifications.