Specification Brand : HXBER BulletPoint1 : Compatible with machine such as(Explore Air, Air 2, Air 3, Maker and Maker 3. BulletPoint2 : These pen adapters can replace stock pen holder to allow use of other most popular markers and pens (/Bic/) in your machine. BulletPoint3 : Each color represents a different fit model, which you can easily identify by the number on the cover. BulletPoint4 : Depth calibration is not required as the adapter perfectly aligns each pen/mark for precise height and point center. BulletPoint5 : Made of premium ABS plastic material, and easy to install and use. Color : White ItemName : HXBER Explore Air Pens, 9 Packs Pen Adapter Set Marker Holder Replacement for/Bic/Compatible with Explore Air 3/Air 2/Air/Maker/Maker 3 ItemTypeKeyword : desktop-thermal-label-printers Manufacturer : HXBER PartNumber : OS6455HXBUS813 ProductDescription : Specification: Quantity: 9pcs Package Size: 10x15cm/4 x 5.9in Package Weight: 35g/1.2oz