This is an initial installation item for a new condominium. It was only used for a water flow test run. It is rated as "like new." Please understand this before purchasing. Authentic product Year of manufacture unknown Stored at home No box A built-in Cleansui water purifier cartridge equipped with a 17+2 filter. - Brand: Cleansui - Model number: HUC17021 - Type: Undersink built-in type Thank you for viewing.