Do Not Block Fire Extinguisher Floor Sign, 40 cm (16") Wide, Industrial Strength Mighty Line Floor Sign. 50 mm (2") wide Mighty Line Floor Tape. Mighty Line Floor Marking Kits complies with OSHA 1910.157(c)(1), keeping areas in front fire extinguishers clear is important during times of emergency. Avoid OSHA penalties by applying the Mighty Line floor marking kits to your clean, dry floor. By ensuring access to fire extinguishers with a high visablility floor signs and tape, this product creates a safer environment. To apply, simply peel and stick the floor sign to the area in front of your fire extinguishers. Then, cut along the dotted lines to get your three segments of tape to apply as a boundary. This tape boundary ensures no pallets or tools block the area. This kit does not leave floor residue.