Features and BenefitsDocumentsSpecificationsFeatures and Benefits The Miniflex® has a four-stage filtration process. In the final stage (stage four), the air flows through a HEPA filter (also known as High Efficiency Particulate Air), which increases the Miniflex® filtration efficiency up to 99.97%. Documents Replacement Filters Specifications DIMENSIONS (H X W X D) 2.44 in x 3.94 in x 8.43 in (62 mm x 100 mm x 214 mm) NET WEIGHT 0.71 (0.32 kg) SKU: KP2390-4 Categories: Brands, Filter Replacements, Lincoln Electric, Weld Fume Control Brand: Lincoln Electric