Pentek NCP-20BB # 155382 NCP20BB Big Blue GAC Carbon Taste & Odor Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Big Blue 10 Micron Pleated Carbon Impregnated Polyester Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155382 NCP Series cartridges are constructed from a carbon impregnated non-cellulose media. They offer sediment filtration, as well as taste, odor and chlorine reduction all in one cartridge. Unlike cellulose cartridges, 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 Big Blue water filter cartridges are excellent polishing filters, and are ideal for whole house and well water applications. Order a case and save even more.