Tired of light and air leaking into your Elegoo Centauri Carbon's chamber when you're not using the spool holder? This simple, sleek spool hole cover is the perfect solution. This cover seals the small gap in the spool holder's opening, maintaining a consistent environment inside your printer. Its design sits perfectly flush with the printer's body, giving it a seamless, integrated look. Plus, a built-in hex key hole makes installation and removal a breeze whenever you need it.