6 Pack Water Filter Replacement Compatible with All PUR®, PUR®PLUS Faucet Filtrat-ion Systems, Pur® RF-9999® Faucet Water Filter, High Efficiency Filtration and 18-Month Value, NSF Certified, BlueThis water filter replacement is compatible with All PUR, PUR PLUS Faucet Filtration Systems, PUR RF 9999 Faucet Water Filter. For PUR Classic, Advanced, Horizontal, Vertical Faucet Mounts. 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 other models. Our water filter is certified by NSF International to