Holmes Replacement Humidifier Filter HWF62 (2 Pack) Pack of 2 Filters (HWF62) fits HM5100, HM1300, HM1761 Works with many HOLMES and SUNBEAM Models (See Decription for full list) ARM & HAMMER Baking Soda Layer Filters Impurities and Odors Antimicrobial Treated Layer Inhibits growth of mold and bacteria on the filter Lasts Up To Six Weeks