R SERIES PLEATED POLYESTER CARTRIDGESPleated design maximizes dirt-holding capacityVersatile and reusable, allowing for a variety of usesDurable polyester media is bacteria and chemical resistantNominal 30-micron rating (R30) and nominal 50-micron rating (R50)R Series cartridges are manufactured from a durable, non-woven and reusable polyester fabric that is suitable for a wide range of filtration uses. The media is pleated around a polypropylene core for added strength and the ends are immersed in a thermo-setting vinyl plastisol. Embedding and sealing each end of the pleat in this fashion fuses the three components together forming a unitized end cap and gasket. The overlap seam is sonically welded to reduce internal bypass improvingfiltration efficiency.The standard 93⁄4" length cartridge has more than four square feet of polyester fabric, while the larger Big Blue� version has more than 16 square feet. The media is pleated to maximize dirt-holding capacity and extend the time period between changes or cleaning.R Series cartridges are resistant to both bacteria and chemical attack making them suitable for a variety of residential, commercial and industrial applications.Materials of construction:Filter Media: Non-Woven PolyesterEnd Caps: Vinyl PlastisolCore: PolypropyleneTemperature Rating: 40�F to 125�F (4.4�C to 51.7�C)