Size10" in length. Includes 10" ceramic filter*4, rubber washer*4, wing nut*4 Contains activated carbon Activated carbon in ceramic water filter for chlorine reduction, taste reduction and odor reduction MaterialThe main body is made of 100% natural sintered diatomite, has excellent resistance to high temperature and high pressure. SIZE OF PORES0.5 micron (human hair is 40 to 300 microns)cleanable filter elements are designed to remove suspended solids, hydrogen sulfide and lead ApplicationThis replacement filter is suitable to most home, travel, lightweight, large countertop and water cooler water filtration systems. It can also be used with household buckets or other water tank faucets to DIY a water filtration system.