Feature: 1. Simple Design: Light and compact, easy to carry and use, convenient and practical. 2. Stable Performance: High reliability, suitable for replacing your damaged products. 3. Applicable Model: Specially designed for WF?7610 WF?7620 7621 3620 3640 7111. 4. Durable Material: Made of PPE and PPS materials, light weight, rust proof, non fading and durable. 5. Strict Testing: 100% functional testing is carried out after production is completed and before shipment. How to Use: For blank page improvements: 1. Check whether the cable is powered on and replace it in time 2. Check whether there is air in the ink tube, and if there is air, pump the ink to exhaust in time 3. If the protective liquid in the print head encounters a blank, it needs to be cleaned and then printed. Specification: Item Type: Printhead Color: As Pictures Shown Material: PPE+PPS Weight: Approx.90g/3.2oz Applicable: for WF-7610 WF-7620 7621 3620 3640 7111 Package List: 1 x Printhead Note: 1. Please allow 0?1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.