Pentek NCP-BB # 155398 NCPBB Big Blue GAC Carbon Taste & Odor Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue Pleated Carbon Impregnated Polyester 10 Micron Water Filter. 10" long X 4 1/2" diameter. 8 per case, sold individually. Ametek # 155398 NCP Series cartridges are constructed from a carbon impregnated non-cellulose media. They offer sediment filtration, as well as taste, odor and chlorine reduction in one cartridge. Unlike cellulose filters, NCP Series cartridges are resistant to both bacterial attack and biofilm buildup allowing them to be used for municipal and non chlorinated water applications. Pleats provide additional surface area for high dirt loading capacity, while maintaining minimal pressure drop. This combination of pleated polyester media and carbon filtration produces and outstanding filter cartridge with extended service life. NCP Series cartridges are excellent polishing water filters, and are ideal for whole house filtration and well water applications. Order a case of 8 and save even more.