Compatibility: This back glass replacement is designed specifically for the Galaxy Z Flip 4 and Z Flip 4 5G F721 models. Please ensure you verify your phone model before purchasing to ensure a perfect fit and seamless integration. Functionality: Crafted from premium glass, this back cover replacement not only restores the elegant look of your device but also provides a smooth, luxurious touch. It's the perfect solution for replacing cracked, scratched, or damaged back covers, giving your phone a fresh, new appearance and extending its lifespan. Pre-Installed Camera Lens and Adhesive: Simplify your repair process with the pre-installed camera lens and adhesive. There's no need to remove the old camera lens; simply remove the damaged glass and apply the new cover. The pre-installed adhesive ensures a secure fit, making the installation process straightforward and hassle-free. Comprehensive Repair Tools: The package includes a complete set of professional repair tools, making it easier to remove the broken back glass door. While the process requires patience and care, these tools are designed to assist you in achieving a successful DIY repair, saving you time and money on professional services. Important Notice: Please note that no operation instructions are included. We highly recommend professional installation to ensure the best results. However, if you choose to undertake the repair yourself, numerous online guides and step-by-step videos are available to assist you. Embrace the DIY spirit and enjoy the satisfaction of restoring your device to its original glory.