Features: None matter for drinking, cooking, brewing coffee or making tea, you deserve refreshing and great tasting water for better enjoyment. Highly efficient filtration ensures you have quick access to clean and crisps water. none trickles, none waiting. Change your filter every 3 months or 100 gallons, whichever comes first will vary based on water conditions. Interchangeable with RF9999 faucet water filter replacement; Suitable for 3700B, 3700, 3400B, 9000B, 4000B, 4100B, 3333B, 3800, 9400B, 9100B, 2100B, 2000B, 2800N, 9600B, 0A1, 3800, 2700G, 9500, 2500V. Without the need for professional tools, users can replace filter in just a few minutes without the need for complex steps. Specifications: Component: carbon fibers Size: about 10.6x6cm/4.17x2.36inch Package Includes: 1set Faucet Replacement Water Filter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.