This item is for 10 generic Hawk Commercial dual motor upright vacuum cleaners models UVT14, and UVT18. The Hawk Pursuit uprights are their dual motor vacuums, that have on-board attachments. If you're Hawk vacuum has on-board cleaning tools, these are the correct bags for your vacuum. If you're vacuum doesn't have on-board tools, then you'll need to purchase Hawk Part 660638. These bags are micro-lined bags which contain an inner layer of electrostatically charged material that helps capture microscopic particles that standard single ply bags will not capture. These bags are designed to fit Hawk Part Number 53430A. 10 Bags Per package. Also fits Clarke CombiVac, and N.A.C.E. DM1400, DM1800.