Feature:1. Compatibility: Back glass cover housing door is compatible for Galaxy Z Flip 4, Z Flip 4 5G F721. Please check your phone model before purchasing.2. Function: This back cover glass housing door replacement made of glass and gives you a good touch feeling, replace your cracked, scratched, damaged, old, unusable phone.3. Pre Installed Camera Lens And Adhesive: No need to remove the old camera lens as the new back glass replacement is with a camera lens. Just put it on directly after removing old glass. Back adhesive was pre installed.4. Repair Tools: It comes with a full professional repair kit. It will be much easier for you to remove the broken back glass door. Please be patient and careful if you want to try to replace it.5. Notice: No operation instructions are provided. Professional installation is highly recommended to replace this part. If you want to try, there are plenty of guides available online. Follow step by step videos and you can install it. Enjoy the fun of DIY.Specification:Item Type: Back Glass Cover ReplacementMaterial: GlassWeight: Approx. 118g or 4.2ozCompatible: For Galaxy Z Flip 4, Z Flip 4 5G F721.Package List:2 x Back Glass Cover Replacement 1 x Phone Holder1 x Pry Tool1 x Pressing Plate3 x Auxiliary Tools