About the packaging: Disposable plastic cases are currently the mainstream for sharp refills. Students, who are the main users of the product, have made comments such as, “It’s a waste to throw away clean cases,” “Empty cases accumulate quickly because 0.3mm cores are easy to lose,” and “Isn’t there a more environmentally friendly way to use them?”. Interest in sustainable manufacturing and consumption behavior is increasing as a social situation. Unideveloped this product while looking for the next level of sustainability for sharp refills while taking advantage of the convenience of existing cases. About the lead: Uni Smudge-Proof Lead was created to minimize smudging compared to traditional pencil lead. Even when a highlighter is used over the top of this lead it resists smudging. Uni Smudge-Proof lead sustainable refills are available in .3mm and .5mm, and your choice of lead density: HB or B. This lead will keep your pages and notebooks cleaner!

• Available in .3mm and .5mm and your choice of density: HB or B
• .3mm includes 64 lead pieces (2 times the normal amount)
• .5mm includes 100 lead pieces (2 times the normal amount)
• Check out Uni’s lifetime metal lead case!