This is the 0.5mm version of the rOtring 300 (Model: RO300). Due to corporate policy, all standard sizes in this line have been officially discontinued, leaving only the 2.0mm holder in production. No further restocks will occur once current inventory is exhausted, making this 0.5mm variant highly collectible. 

Built with high-strength plastic and a classic hexagonal barrel, it delivers exceptional structural durability and a stable, roll-resistant grip.