Dimensions: 25 cm long. Includes 4 x 7" ceramic filters, 4 x rubber washers, 4 x wing nuts. Contains activated carbon: activated carbon in a ceramic water filter to reduce chlorine, improve taste, and reduce odor. Material: The main body is made of natural sintered diatomite, offering excellent high temperature resistance and high pressure resistance. 0.5 micron pore size (human hair is 40-300 microns). Cleanable filter elements are designed to remove suspended solids, hydrogen sulfide, and lead. 【Application】This replacement filter is suitable for most household, 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.