... acrylic and stainless steel 3. 5 years guarantee Description: waterproof led letters 1. Material: acrylic (different colors are ... Energy-saving9. Lifespan: Up to 100, 000 hours.10. Waterproof, fireproof, corrosion resistance11. Warranty: three to five year.12 ... 14. Ideal for:shops, business, hotel, auto dealers, hospital, school, real estat15. Accept customization16. Excellent after-sales service ...