product code C13T671198 (also widely known as T6711 or C13T671100) refers to a specific Ink Maintenance Box (Waste Ink Collector) manufactured by Epson.
 
Contains absorbent pads that safely collect waste ink flushed from the system.
Prevents ink build-up and leaks inside the printer, which is essential for protecting internal components and ensuring continuous, clean printing. When full, the printer will cease operation until the box is replaced.