【Good Quality】: We prioritize 100% imported PEI raw film renowned for greater thickness and enhanced adhesiveness, making it ideal for PLA, PETG, PEEK, ABS, and more. Despite a higher cost than PET/PEO, PEI's exceptional performance—especially in high temperatures—positions it as a superior investment. Additionally, our inclusion of a thick stainless steel plate, explicitly rejecting inferior materials, guarantees resilience and flatness during transportation, extending its life. 【Exceptional Initial Adhesion】: Rigorous testing substantiates our claim that models firmly adhere to the print bed surface. Even novices can effortlessly achieve impeccable prints. Our double-sided PEI spring steel build plate, featuring both a smooth film for a flawless finish and a textured spray for a matte effect, stands out for its cost-effectiveness compared to designs utilizing similar materials. 【Ease of Disassembly and Utilization】: Dispensing with the need for adhesives or specialized textured papers, the spring steel plate merely requires thorough cleaning before placement on the printer's heated bed. Once adequately heated, printing commences effortlessly. Post-printing, a simple bend facilitates the easy removal of the model without necessitating additional tools. (Please ensure removal of the factory protective film from the smooth surface before usage). 【Practical Features】:Size:309mm/12.17inch is suitable for FLSN V400 and other the same size 3D printers.If you are not sure, you can contact us to communicate and confirm.PEI sheet are easy to clean and maintain, with no need for additional adhesives or treatments. They can be cleaned with soap and water, or with a solution of isopropyl alcohol, which makes them very convenient for everyday use. 【Quality Promise】: Rubber magnetic sticker included.PEI is very expensive compared to PET/PEO, but its good performance, especially high temperature resistance and stability are still ahead. You get what you pay for, I hope you can choose more suitable products according to your own printing materials.All products have UNDERGONE QUALITY INSPECTION before delivery. If you have any questions about product quality and suggestions, please feel free to contact us and we will reply within 24 hours. Round 309mm in Dia Flsn V400 Build Plate Smooth & Texture 100% Imported Thicker PEI Sheet Spring Steel Heated Bed Flexible Platform with Magnetic Base for Flsn V400 3D Printer Kit.