CENTO3. THE 99% PENCIL A pencil made of pencils. A mechanical pencil with a trilobed arch shape, made of graphene filaments and a chrome-plated metal mechanism. Each piece is individually produced using innovative 3D additive manufacturing techniques. The unique complex arch design is extremely clean, ergonomic, and perfect for a three-finger grip. It has a pleasant tactile finish, excellent non-slip grip, and a natural graphite color. Includes 3 0.7 mm HB leads. Mechanical pencil length: 13.0 cm Diameter: 1.1 cm Weight: 13 g Material: Bio-based PLA polymer and graphene Production: Hand assembly, 3D printing Made in Italy Distinctive features of CENTO3: SEAMING The visible stitching along the body certifies the slow and precise production of each piece, increasing its value over time and the quality of the 3D printing. Each artifact becomes even more valuable thanks to its own "scar," with a unique graphene filament texture, pleasant to the touch, and a natural graphite finish. THE TRILOBED SHAPE: The trilobed cross-section prevents the writing instrument from slipping like round pens and provides a perfect ergonomic three-finger grip. The name CENTO3 marks the years from the birth of Achille Castiglioni (1918) to the public presentation of the writing project by architects Castiglioni and Cavaglià (2021).