These MBM Destroyit shredder bags come directly from the manufacturer and are specifically designed for use in MBM Destroyit paper shredders. If your Destroyit shredder model contains 3105, 3803, 3804, 4000, 4000ss, 4002, 4003, 4004, 4005, 4011, 4012, 4202, 4605 and 4606, then these bags will work for you.