Sprinter VS30 Seat Box Covers (Complete Set)Set includes 4 covers per seat base (8 covers total). Mats adhere to the seat box using adhesive backed hook and loop (included). Note: Having a fire extinguisher or heater vent mounted on the back of your seat boxes is not a problem. You can simply cut the material around your heater vent and take off and remount your fire extinguisher on top of the cover. Please measure the height of the back your seat boxes to ensure correct sizing; There are 2