PP30-BB pleated polypropylene are manufactured from a durable polypropylene media. They are resistant to bacterial attack and compatible with a wide range of chemicals. The high porosity of the media provides higher flow rates and dirt holding capacity, while maintaining extremely low pressure drop. 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 block in this fashion fuse of three components together forming a unitized end cap and gasket. The overlap seam is sonically welded to reduce internal bypass, improving filtration efficiency. PP series cartridges provide nominal 30-micron filtration and are highly effective at reducing medium/fine particles in a variety of residential, commercial and industrial applications. Pentek PP filter features pleated design maximizes dirt-holding capacity designed for general water filtration purposes nominal 30-micron rating Microns Dimensions Pressure Drop Model 30 4-1/2" x 9-3/4" 1 psi @ 10 GPM PP30-BB Materials of Construction: Filter Media Non-Woven Polyester End Caps Vinyl Plastisol Core Polypropylene Temperature Rating 40 F to 145 F