Product: All-in- Computer Adhesive Strip Stickers Replacement for 21inch A1419 This Package contains two pieces 31cm tapes, two pieces 25cm tapes, piece 25.5cm tape, and piece 25.6cm tape, can be used to replace the adhesive tape for the computer screen. The adhesive stripe tape is -sided tape sticks the display the computer. Please note disassembling the device, there might be internal inside the device, so professional disassembly techniques are required. During the process of installing and disassembling the device, it is recommended to wear -static wrist strap and turn off the device to avoid unnecessary damage. Specification: Material: Plastic Length: two pieces 31cm tapes, two pieces 25cm tapes, piece 25.5cm tape, and piece 25.6cm tape Package Includes: 6 Pieces LCD Screen Adhesive Strip Stickers Note: These adhesive stickers are designed for A1418 NOT A1419. The color might be slightly different due to the color calibration of each individual monitor. Please slight measuring deviation due to manual measurement/margin tolerance.