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A blur-free ballpoint pen with controlled "writing vibration (blur)" The contact between the paper and the tip of the pen and the "vibration" inside the pen was transmitted to the finger holding the pen, giving stress without noticing it. "Blen system" controls the writing vibration that is the cause of stress. We succeeded in resolving potential complaints that the user did not notice. 0 Country of manufacture: Japan Material / component: Resin