Patented reinforced design for longer life and better efficiency than standard expanded wicking filters. Traps impurities in the water. Anti-microbial treated. Fits Sunbeam SCM1746, SCM1747. Fits Holmes HM1645, 1730, 1745, 1746, 1750, 2200, 2220. Fits Hamilton Beach 05520, 05521. Fits White-Westinghouse WWHM1645, 1750ZE. Fits Bionaire BCM1745. Fits Touch Point S30E, S30E-A.