Fits Filtrabox Expand X1 & X2 This replacement filter set fits both FILTRABOX EXPAND X models: X1 & X2 Best-In-Class Filters: Fan Filter Pre-Filter HEPA Block Large Activated Carbon Filter Outstanding Performance: TRIPLE FILTRATION: The three-stage filtration system removes virtually all laser engraving byproducts: fumes, odors, and airborne particulates, without venting outside. ADVANCED AIR PURIFICATION: Eliminates virtually ANY smells and odors from laser operations, including acrylic, rubber, leather, and more. EASY TO INSTALL: All Filtrabox filters are easy to replace. No frustrating setup or dusty cabinets to deal with. LONG LASTING: Replacement filters have a 6-month life cycle but vary depending on daily use.   Please email the following information to support@omtechlaser.com (required by Filtrabox): Your order number Commercial or Residential address Customers' Federal Id Tax # or SSN # Any other specific services required at delivery.   Please contact Filtrabox for your order and tracking info. This product will be shipped to you directly from Filtrabox within 1-2 days.