With this Pen Adapter you can use the most popular pens/markers in your Explore Air, Air 2, or Maker. <br> Forget relying on a color-coding chart! These adapters have the pen/marker abbreviation engraved to make identification quick and easy. Though use is effortless, instructions will be provided for reassurance. <br><br> <b>Depth calibration is not needed as adapters perfectly align each pen/marker for precise height and point center. </b><br> <b>Our Adapters are Constructed with High Quality ABS Plastic and every adapter inspected befor shipping,If at any time you have questions or concerns about our products, do not hesitate to reach out to us. </b> <br><br> <b> Note:Pens and markers not include. </b> <br> <b> This adapter not Compatible with the cricut explore one. </b> <br>