Slant Fin 195518 Replacement Mineral Absorption Pads Fits Slant/Fin Germ-Free humidifier models GF-200, GF-200B, GF-210, GF-210W, GF-220, GF-300 AND GF-350. Original Slant/Fin Mineral absorption pads! 6 pads per bag. Mineral Absorption Pads will capture and remove minerals from hot water reservoir, and prevent mineral buildup.