Whirlpool 2-pack Side-by-Side Refrigerator Filters: 4396841P for $35.59, 4396710P for $42.2

NSF certified refrigerator water filter retains beneficial fluoride in water while reducing chlorine taste and odor
Also reduces particulates, lead, and mercury
Replace every six months for best results
Dimensions: 13 inches long by 4.6 inches wide by 2.6 inches tall
This item sold in a convenient two-pack