This is a pack of three refrigerator water filters compatible with brands such as 4396508, 4396510, nlc240v, and 4392857. The filters are certified by NSF42 and NSF372 and can remove chlorine taste and odor. They have a filtration life of 6 months or 300 gallons and operate at a pressure of 30-120 psi and a temperature of 34-100℉. The flow rate is 0.5-1 GPM. The filters are made of natural coconut shell activated carbon and lead-free material. Delivery time is 1-3 working days. Please not one box has slight damage to box only , all filters are new ! Thanks for looking!