Note: Please soak the filter in clean tap water for 3 minutes to flush the filter and release the bubbles before using. [NSF certifications] Tested and certified by NSF International against NSF/ANSI standard 42 for the reduction of chlorine, taste and odor, and to NSF/ANSI 372 for lead-free material. For detailed NSF certification information: Visit the NSF official website, type " AQU-CF08B" into "Brand name/ Trade name/ Model" bar and click the "Search" button. [High-efficiency filtration] AQUACREST faucet water filter uses premium natural coconut activated carbon block with a reduction rate of chlorine up to 97.2%. By its outstanding filtration performance, the filter can effectively reduce sediments, large particles, rust, taste and odor, which are tested by a third lab, to improve the drinking experience. Please note that the filter cannot reduce TDS. [Long-lasting service life] This filter has a long-lasting service life. Please replace the filter every 3months to enjoy healthy drinking water, and please note that the specific replacement time may vary based on water quality. [Compatibility] The AQUACREST faucet filter can be adaptive to PUR PLUS faucet water filter，interchangeable with PUR RF-3375 faucet water filter, for use with PUR Classic, Advanced and Horizontal Faucet Mounts, including PFM100B, PFM450S, FM-3333, FM-9400B, FM-3700B, FM-3700, FM-2000B, FM-9000B, FM-4000B, FM-4100B, FM-2500V, FM-3400B, PFM350V, Pur-0A1, FM-9600, PFM150W, PFM400H, PFM-270G, PFM800HX, FM-9600 and more models. This filter is not sourced by or sponsored by PUR. AQUA CREST CF08B Faucet Filter, Compatible with All PUR PLUS Faucet Filtration System, Replacement for RF-3375, NSF 42 Certified, 9-Month, 900-Gallon, 3 Pack