This Pen Holder has been designed to convert your Silhouette machine into a sketching and drawing machine. This Pen Holder features 3 threaded adapters that allow you to use varying sized pens, from a thinner standard ball-point pen to a thicker felt-tip marker to create a variety of personalised designs.Features & Benefits Includes 1 Pen Holder Features 3 adapters for varying pen sizes Compatible with Silhouette Portrait, Cameo and Curio Machines Specification Pen Diameter Range: 0.25 inch - 0.4 inch