RPS #HW500 Extended Life Wick Filter Extended life wick filter, fits Honeywell Hcm1000, Hcm2000, Kaz3020, vicks V3500, robitussin Dh835, Hac504 Adds extra shine to your product Proudly made in the USA Antimicrobial Wick Filter Traps impurities in the water Up to 150% stronger Aluminum reinforcement