"Transparent Pre-Filter bowel+1/4"Connector 2 in number is a very useful item for your household that will ensure that you and your precious family stay in pink of their health. The RO pre filter is a necessity if you want to keep your ROs membranes in top condition. The regular use of any Ro decreases its efficiency to some extent posing a threat of contamination. The best way to safeguard you against this danger is to use this pre filter that comes with a spanner, pipe and spun filter. It is compatible with all 10 inch filters like carbon pre filter, polyspun pre filter, Fluoride Pre Filter Cartridge, KDF Carbon Pre Filter , Paper Pre filter cartridge, Sterasyl Filter for tank water and ultracarb water filter for tank water.