The PSF-1R Replacement Filter for PSF-1 and PSF-1W 3 Stage Premium Shower Filter fits the Pelican PSF-1, PSF-1W and PSF-1NH shower filters or ALL Pelican model shower filters. One of the most important things we can do is protect ourselves from the immediate and long-term damaging effects dangerous chemicals such as chlorine in our water. Start today by enjoying the many health benefits, including softer hair and skin, with the Pelican Premium Shower Filter.