Standard Size Fits all standard 10″ sized whole house water filter housings, size at 4.5″ diameter x 10″ height. High Quality Coconut Carbon FOOD GRADE MATERIAL-Made of 100% high quality coconut carbon . Carbon block filter is used to remove chlorine, taste & odors, very fine particulates. life time:6-12months ,these can be used for residential and commercial applications. How It Works? Please refer above photo. Features: FOOD GRADE MATERIAL-Made of 100% high quality coconut carbon . STANDARD-Fits all standard 10″ sized big blue filter, size at 4.5″ diameter x 10″ height Function-Carbon block filter is used to remove Remove chlorine, taste & odors, very fine particulates. life time:6-12months ,these can be used for residential and commercial applications GOOD PACKING-All Filters are individually wrapped&sealed and extend shelf life Specification: FEED WATER PRESSURE: 40 – 100 PSI , TEMPERATE:40-110°F/5-45°C, PH:3.0 -11.0, MAX TDS :1000 PPM, TURBIDITY < 1.0 NTU, MAX SDI <4.0, HARDNESS < 5 GPG, Shelf life: 3Years. More valuable information: ✪What is dimension of a Geekpure Replacement Water Filter? It is 4.5"ODx 10" height and standard. ✪What is the function? Carbon block filter, Remove chlorine, taste & odors, very fine particulates. life time:6-12months. ✪If not Geekpure, the filters is available to other brands filter? Please don't worry. it compatible to most 10 inch standard sized housing ,includes Ispring, Express Water, Culligan and more brands. ✪What is in the box? 4pcs Carbon Block inside. Note: 1. The Life Time of the Filter Cartridge Depends on Usage Amount and Feed Water Quality. 2.It Is Normal for Some Black Carbon Fines to Appear in the Water When Emptying the First 3 Gallons of Water. The First 3 Gallons of Water Produced Should Be Emptied and Not Used.Push the Tubing All the Way in and Use Teflon Tape During Installation.