Multipure CBVOCSB Under Sink Water Filter - Black Faucet Below sink carbon block water filter with stainless steel housing Certified under NSF Standards 42 & 53, also certified by the California Dept. of Health Includes installation hardware, filter cartridge, Black designer faucet and instructions 0.5 micron solid carbon block technology with easily replaceable filter cartridge (model CBTVOC) Filter cartridge is rated for 750 gallons or annual replacement, whichever comes first