Description 1. smells good because of using top quality material and purified water to make.2. much black than any other ink.3. double sides printing.4. quality stable.5. dry speed is faster than that of original one.6. gurantee period is longer than that of original one.7. enviroment friendly.8. one place one agent policy to protect our agents benefit. Specifications: 1) Cartridge type: 600ml. 2) Applicable duplicator models: DP2530/2930/2940/330/430/440.