Property managers and homeowners, this Blulu floor sign is such a simple but effective solution for marking basement levels and other floors! Measuring 2.76 x 7.87 inches (7x20cm), it's the perfect size - noticeable enough to read easily but not so huge that it looks obtrusive. Made from quality stainless steel with a sleek silver finish, this thing is built to last through heavy foot traffic and various weather conditions. The waterproof and moisture-proof coating means you can use it in damp basements, parking garages, or even outdoor stairwells without worrying about rust or corrosion. Installation couldn't be easier - it comes with high-viscosity double-sided tape that sticks securely to concrete, drywall, metal doors, or pretty much any clean surface. No drilling, no tools, just peel and stick! The numbers are clearly etched and covered with a scratch-resistant coating so they stay readable for years. I've used these in apartment buildings and office complexes, and they hold up amazingly well even in high-traffic areas. The double-sided design means people can see the floor number from either direction, which is super helpful in stairwells and elevators. Whether you're labeling basement levels, parking garage floors, or different building sections, this sign delivers professional results without the professional installation costs. The adhesive is surprisingly strong - once it's up, it stays put through daily use and cleaning.