Ceramic Water Filters 4-Pack for Filtration Systems Usage Tips: - Size: 10 inches in length. Includes 10-inch 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 - Material: Main body is made of natural sintered diatomite, offering excellent resistance to high temperature and high pressure - Pore size: 0.5 micron (human hair is 40 to 300 microns). Cleanable filter elements designed to remove suspended solids, hydrogen sulfide, and lead - Application: This replacement filter is suitable for most home, travel, lightweight, large countertop, and water cooler water filtration systems. Can also be used with household buckets or other water tank faucets to create a DIY water filtration system