The original shape-changing pen designed by artist Noah Deledda. Switches seamlessly between solid/crushed. Operates by switch that activates crushed grip and ink cartridge. Comfortable crushed grip Sturdy, durable construction Break resistant plastic Gel ink cartridge (Black) Size: 5.75in (145mm) x .75in (15mm) Shell - Metalized polymer Body - Break resistant plastic Included: Padded storage case