The Fila Dryer S1 is the perfect way to keep your PLA, PETG, TPU, or ABS filament clean, dry, and ready to print. Simply pop your spool of filament inside and the Fila Dryer S1 will keep it at the perfect temperature for printing. This helps to achieve more consistent print results, especially on larger models where temperature changes can vary greatly during a print. The Fila Dryer S1 also has a timer function allowing you to set it to pre-heat your filament so it's at optimal temperature when you need it. The box has a pass through in the flap allowing your filament to leave without reducing the overall spool temperature.