The Presco Products Co. Marking Flag is the perfect tool for marking construction lines on concrete, asphalt and other surfaces. The 4 in. flag height and 5 in. flag width makes this water line marker visible from a distance of up to 200 ft away. The solid blue color helps to contrast against most surfaces, making it easy to see the water line mark from a distance. It has an overall height of 21 in., with a steel wire staff and PVC flag material. When you need to create accurate reference lines, turn to the Presco Products Co. Marking Flag as your first choice.