GERG1016 Features: * Easily attaches to pureguardianTM humidifier model H1300 and H1100 * The FLTDC20 does NOT come with an additional humidifier water tank lid. The filter (FLTDC) should be attached to the original humidifier water tank lid. * Replace filter approximately every 1000 hours or 260 gallons of water depending on the condition of the water used in the product. * Attaches to models: H1300, H1100 Dimensions: * Overall dimensions: 3.1" H x 2.5" W x 2.5" D * Product weight: .5 lbs