... dust and volatility,beautifully shaped,no ink leakage,but breakage-proof.2.With the newest inner ink cartridge of original version,produced ... of design principle and comparable material of original cartridge.3.With imported silion pipeline,superior abrasion resistance,no ink leakage,hard ... by our R&D department,proved rasonable and scientific.5.With ink or empty is optional6.A plug and play support ...