iFilters 0.5-Micron Carbon Block Water Filter – Coconut Shell CTO Drinking Water Filter Cartridge – 10-inch Replacement for Filtration Systems – 2.5" x 10" (4 Pack, Filter)

iFilters 0.5-Micron Carbon Block Water Filter – Coconut Shell CTO Drinking Water Filter Cartridge – 10-inch Replacement for Filtration Systems – 2.5" x 10" (4 Pack, Filter)