The Medtronic 4-070305-00 is a filter designed for use with the Expiratory Bacterial 840 Ventilator. This product plays a crucial role in ensuring the ventilator functions effectively by filtering out bacteria from the expiratory air. It helps to maintain a clean and safe environment for the patient, reducing the risk of infection. This filter is sold in a box of 1, making it suitable for healthcare facilities that require individual units.