Compatibility: Compatible with for Elkay 51300C, and Compatible with EWF3000 Long-Life Filter: With a capacity of 3000 gallons per filter, we recommend replacing it every 3000 gallons or 1 year, whichever comes first. Easy Installation and Maintenance: Provides precise, leak-proof fit, and it's very easy to install. Anti clogging filter: Polypropylene pre filtration can prevent large sediment or particles from entering and clogging the filter medium. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:White Material:Plastic Package Contents: 2 * Water Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.