The CREALITY CHAMBER HEATER is an essential item for optimizing temperature control in 3D printers and improving print quality. I used it only once after purchasing it to check its operation. I no longer need it because I replaced my printer. It works very well, and the test prints came out beautifully. It's practically unused and in very clean condition. Please refrain from purchasing if you are uncomfortable with used items or are overly sensitive to imperfections. I hope this will be a good transaction for the buyer. Thank you for looking.