Compact water filter reduces 99% lead, greater than 99.95% cryptosporidium and giardia cysts, chlorine, bad taste, and odor. Mounts directly onto kitchen faucet; simply pull the diverter valve stem to receive filtered water right from the tap. Use replacement filter cartridge (included). Cartridge dimensions: 3.375" H x 2.5" W x 4.5" D.