Filtrabox MICRO Multi-Stage Fume ExtractorYour Indoor Laser Solution: All OMTech CO2 lasers are designed with exhaust systems that vent to the outside environment. However, venting outdoors is not always an option due to confined spaces, exhaust exit proximity, local health regulations, or other limitations. The FILTRABOX MICRO provides a class leading and affordable indoor laser exhaust solution. You can now operate your OMTech laser engraver in a windowless room and avoid cutting an exhaust