Heavy Duty Fire Extinguisher Do Not Block Mighty Line Floor Sign-  Industrial Strength in 16' or 24' Wide. Mighty Line fire safety floor signs are a great way to keep your warehouse safe and compliant. Mighty Line floor signs are heavy duty and fork lift tires can be wiped off.  Mighty Line safety floor signs are a great floor marking tool. Mighty Line floor signs are perfect solutions for 5s facilities, lean operations, and for warehouse safety. Part Numbers FEDNB16 FEDNB24 Made in the USA