Beaverswood Floor Markers with Warning Messages - Beaverswood FM04, This highly visible Keep Aisles Clear 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 anywhere a permanent sign is required. Beaverswood Floor Marker 430mm dia. Keep Aisles Clear