5 m x 19 mm DEXTER tape measure with top window for easy reading, bimaterial body Dexter tape measure with reading window and 3-meter-long tape. It is ideal for precise measurements on frames, such as installing a window or measuring the inside of a hallway. Thanks to its reading window, you will no longer need to bend the tape on your tape measure to get your measurement, which will facilitate your ease of use and allow you to get accurate dimensions.