These adapters can replace the original Cricut pen holders to allow use of other pens in your Cricut cutting machine. Super simple and easy to use, each adapter holds the pen in the exact centre ensuring that draw and cut operations line up perfectly. No need for depth calibration as adapters perfectly align with each different model of pen for precise height. Easily identify each adapter with the different model code engraved on the pen cover Comes as a 3 Pack - Choose either Grey/Black/White or Green/Pink/Blue they are the same just different colours. Material: ABS PlasticSize: SFP: 15.5x25.5mm, Inner diameter: 12.5mm SUFP: 15x25mm, Inner diameter: 10mm SAP: 15x28mm, Inner diameter: 10mm Suitable for Sharpie Pens such as: Sharpie Art Pen Sharpie Fine Point Marker Sharpie Ultra Fine Point Marker Compatible with the below Cricut models: Cricut Explore Air Cricut Explore Air 2 Cricut Explore 3 Cricut Maker/ MAKER 3