WF is depth wound filters,the materails have two options, with excellent chemicals performance, it use for high temperature and aggressive solvents,with high flow rates,low pressure drop and big dirt holding capacity. High Working temperare: Ratings from 0.5 and 50 micron OD60mm,63mm,114mm Length:10", 20",30",40" ID 28mm,30mm Nylon Celsius degree 110, PTFE Celsius degree -80-190, High Differential Pressure reach to 4.2bar PH Value 6-14 for Nylon PH Value 1-14 for PTFE ,Gas and Liquid Raw Chemicals Acid etch systems Most aggressive and/or high temperature acids or solvents , the materials Nylon and PTFE