Beaverswood floor markers with warning messages beaverswood fm21 this highly visible 5 mph floor marker from beaverswood is designed for use in warehouses and other workplaces the easy to understand message is printed onto the underside of a clear pvc film and then laminated on the back surface of the floor marker with a highly effective permanent adhesive the sign is suitable for use on dry clean flat sealed surfaces and although designed for the floor it can be used on walls or anywher