Features: These pen adapters can replace the stock pen holder to allow use of other most popular markers and pens (Sharpie Fine Point Markers/Ultra Fine Point Markers/Sharpie Art Pens ) in your machine. Compatible with machine such as Cricut (Explore Air, Air 2, Air 3, Maker and Maker 3). Each color represents a different fit model. Green/Grey: for Sharpie Fine Point; Pink/Black: for Sharpie Ultra Fine Point; Light Blue/White: for Sharpie Art Pen. Depth calibration is not required as the adapter perfectly aligns each pen/mark for precise height and point center. Made of premium ABS plastic material, durable and easy to install and use. Specification: Material: ABS Plastic Quantity: 17pcs Package Size: 10x15cm/4 x 5.9in Package Weight: 55g/1.9oz Packing List: 17 x Pen Adapter