Cricut Joy Opaque Gel Pens White 3 Opaque Gel Pens (1.0 mm) in Yellow, White, Blue; Highly opaque ink shows up well on light and dark materials; Embellish projects with personal notes or drawings using your Cricut Joy cutting machine; Ideal for paper crafts, cards, labels, invitations, or adding a "handwritten" message; For Cricut Joy cutting machine; Water-based, acid-free, nontoxic, permanent after dry; conforms to ASTM D-4236 Made to stand out on the deepest hues of paper, cardstock and labels, these opaque gel pens add a pop of personality to your cards, paper crafts and decor. Embellish even your darkest materials, it's easy add a playful note or a fun drawing with your Cricut Joy machine. Compatible materials include Cardstock, Paper, Cards, Smart Paper Sticker Cardstock, Smart Label Writable Paper. Not compatible with regular vinyl.