PUR 3 Stage Faucet Water Filter Replacement 2-pack with Tray...PUR s most advanced filter to improve the quality of drinking water; Conveniently provides up to 100 gallons (two to three months) of crystal clean water; Easy-to-change design that is interchangeable with any PUR Faucet Filter and Side Tap System; Removes 99% of lead and reduces many other water contaminants while retaining beneficial fluoride; Removes 99.9% of microbiological cysts (cryptosporidium and giardia).