Pentek R30-BB Reusable Water Filters features a nominal micron rating of 30 Micron and is made with 10"" L x 4, 5"" W dimension, These series of filter cartridges are made from a durable, non-woven and reusable polyester fabric that makes it highly suited for a wide range of filtration uses, It has an advanced media that is pleated around a polypropylene core for extra strength and the ends are immersed in a thermo-setting vinyl plastisol, Embedding and sealing each end of the pleat in this patterns helps in fusing the three components together to produce a unitized end cap and gasket, The overlap seam is welded sonically to lessen internal bypass, thereby improving filtration efficiency, This standard 9-3/4"" length cartridge is composed of more than four square feet of polyester fabric and the larger Big Blue version of the fabric has more than 16 square feet, The pleated media of the product helps in maximizing dirt-holding capacity and expand the time period between changes or cleaning, It also offers resistant to both bacteria and chemical attack and are thus suited for a variety of residential, commercial and industrial applications, They have 1 psi 10 GPM of Pressure Drop and is constructed with Non-Woven Polyester Filter Media, Vinyl Plastisol End Caps, Polypropylene Core and has a Temperature Rating of 40F to 145F, SKU: CWD1765