Gravity fed felt tip applicator has 3 flow options: Least Flow, Moderate Flow and Most Flow. Coverage area either .750" or .315" in a straight line or any width from .312" to .750" when held on an angle. Applies most viscosity materials such as tape adhesion promoters, primers, oils, solvents and water. Note: When using for extensive time periods and for assembly line production the use of a Docking Station is recommended. To purchase a Docking Station search ASIN: B09D4T9MQX. To purchase more .750" felt tip applicators search ASIN: B083PVJM44. To purchase larger felt tip applicators 1.625" x 0.312" search ASIN: B0BBXSHZ6Y.