The Micro-KleanTM RB Series Cartridge manufacturing process produces a rigid, resin bonded, graded porosity structure that reduces by-pass and avoids the unloading characteristics of soft and easily deformable competitive meltblown and stringwound filter cartridges. The design of Micro-Klean RB series cartridges provides a family of filter cartridges that offer distinct benefits:  Consistent particle reduction efficiencies  Extended cartridge life  Ability to withstand high temperatures and elevated differential pressures  Broad chemical compatibility  Consistent batch to batch filtration characteristics Micro-Klean RB series filter cartridges are the product of continuous refinement of manufacturing and fiber technologies. Available in both grooved and ungrooved versions, Micro-Klean RB series filters are ideal for a wide variety of applications. The grooving of the outer surface significantly increases the filter’s effective surface area, and increases the contaminant holding cAir Huarache Run Ultra BR