【High-efficiency filtration】Efficient coconut carbon block for ultimate purity by reducing harmful impurities. Note: For cold water only! 【Long-lasting service life】Optimal performance for up to 6 months or 2,000 gallons, which will vary based on water conditions. 【Stable flow rate】 Provides you with stable filtered water without obvious pressure drops. The filtration is efficient enough to provide you with the best drinking experience. 【Easy to install】For detailed instruction, please kindly refer to the Instruction Manual in the box. 【Compatible Model】Interchangeable with Aqua-Pure AP517, AP510, AP517EA. This filter is not sourced by or sponsored by 3M. AQUA CREST AP517 Under Sink Water Filter, Replacement for Aqua-Pure AP517, AP51711, AP510, AP517EA, NSF/ANSI 42 Certified, 2000 Gallons Extended Lifespan, More Pure Enjoyment, 1 Pack