Printer R40 Ink Back Stamp 40mmProduct information: Size: 40mm Material: ABS resin Shape: round Features: 1. Built in printing pad, the printing is clear and easy to cover 2. The frequency of stamping is high and can be covered hundreds of times in one minute (more than ten times more durable than photosensitive) 3. The total lifespan is super long, and it is no problem to use it for more than ten years 4. The content of the seal can be changed, saving money 5. The built in ink pad