This document summarizes the features and specifications of a depth cartridge filter. The filter is made of PET material, which allows it to be used for filtering liquids like water, oils, and acid solutions at temperatures up to 90°C. It has a novel gradient design that provides high filtration efficiency, high dirt holding capacity, and good contaminant retention along with low pressure drop. The filter media can be customized in terms of weight, width, diameter and other properties to meet user requirements.