6 pk Hydronix 10"x2.5" 5 Micron Grooved Sediment Melt Blown Filters Cartridges (Compatible Replace Aqua-Pure AP110, Whirlpool WHCF-GD05, Watts FPMBG-5-975) Hydronix Sediment Grooved Filter Have Increased Surface Area for Longer Life and Better Performance 5 Micron, 10"x2.5", 6 pk This cartridge replaces: Aqua-Pure AP110, Whirlpool WHCF-GD05