These filters are custom made to fit the vents on a Corsair 540 Air case. these type of filters ensure that dust doesn\'t enter the case and build up substantially over time to cause component damage, these dust filters are removable and easily cleaned, with the light meshing and fine holes these filters do not cause lack of airflow, and allows fans with unhindered airflow.Specification:- Top: 148mm x 280mm- Bottom: 148mm x 313mm- Rear Side: 146mm x 124mm- Rear Left: 232mm x 101mm- Side: 143mm x 174mm- Front: 140mm x 359mm