... to IP68. 3,supply free samples testing Acralic Emboss Letter LED MOUDLE 1.acrylic material2. Laser cutting ,smooth line ... . Uniform lighting, different light color every back of the letter;5. Size: according to customers' requirements6. Safe voltage: ... , waterproof, fireproof, corrosion resistance;Application:This kind of acrylic emboss letter for: Shops, business, hotel, auto dealers, hospital, school. ...