1. Compatible with Xiaomi Mi water purifier. 2. Made from DOW filter medium, has strong capacity to filter out heavy metal, germ and organics. 3. Easy to apply it to your Xiaomi water purifier. Please note that you'd better to replace it once a year and a half to 2 years. Specification: Package Weight One Package Weight 0.59kgs / 1.29lb One Package Size 34.5cm * 6.5cm * 6.5cm / 13.58inch * 2.56inch * 2.56inch Qty per Carton 25 Carton Weight 11.66kgs / 25.71lb Carton Size 35cm * 35cm * 35cm / 13.78inch * 13.78inch * 13.78inch Loading Container 20GP: 621 cartons * 25 pcs = 15525 pcs 40HQ: 1443 cartons * 25 pcs = 36075 pcs