Reliable PET Material -- Adhesive Blackout tape measures about 8 m/ 214 inches long, 10 cm/ 3.9 inches wide and 0.05 mm thick, features good masking and insulation, not easy to break and tear. It offers light management solutions for multiple optical display devices. Blocks 50-70% of Light -- This dimmer tape is particularly suitable for light sleepers and babies to cover annoying LED lights and provide a dark, quiet sleeping environment. Widely used -- This light dimming tape can be used to block any annoying LED Indicator Light on electronics, tv, computer, routers, air conditioner in your home, car, office and so on. It suitable for fixing LCD panel and LED backlight module.It can also be used to block any privacy-leaking cameras. Applied to various material surfaces -- Light Blocking tape with adhesive backing can be used on different surfaces according to your needs, such as plastic, glass, metal, aluminum, stainless steel, etc. No residue and easy to remove. Free Cutting and Safe to Use -- Light dimming tape can meet your more blocking needs. You can easily cut it into strips, square and any different sizes. Paste, and remove it without leaving any sticky residue.