These replacement water filter cartridges fit standard 10 inch by 4.5 inch filter housings and replace multiple brand-name filters including GE and Culligan models. The two-pack set uses triple-action coconut shell carbon block filtration with microscopic pores for improved contaminant capture. Each filter handles up to 300 gallons, approximately six months of typical household use. Verified lead-free and BPA-free with NSF 372 and NSF 42 certification. Precision manufacturing ensures leak-free installation.