Activated carbon filter: Used together with activated carbon filter, it can achieve the effect of high quality coconutCompatibilityGood replacement for BB9-2 water filter, compatible with various gravity filtration system models, including Travel Series, Big Series, Royal Series, Imperial Series, Crown Series.Safe and high-quality materials: Made of natural coconut shell activated carbon and high-quality activated carbon sintering processBlack activated carbon water filter ensures your family enjoys a safe water experience. The filter material is strictly controlled and does not contain leadFor optimal performance and longest device life, it is recommended to replace the filter every 1000 liters. Package Contents: 4 replacement filters Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!