iSpring FP15 5 micron 15000 gallon Multi Layer Universal Sediment Filter Cartridges, 10" x 2.5" Patented 3-layer gradient design, up to 3 times more efficient than non-gradient filter 2.5 inch (O.D) x 10 inch (length) x 1 1/8 inch (I.D), fits industry standard 10 inch filter housings Perfect for ro, counter-top, whole-house water filters and ice machine, film, beverage processing Manufacturer direct sale - legendary brand, genuine high quality filter cartridge Supply Basedout ofatlanta,Georgia;(678)261-7611