ストレスなく集中して書くための「筆記振動」を制御したブレないボールペン。●ボール径：0．5mm●軸色：黒軸●インク色：黒●全長：143．6mm●軸径：11．8mm●替芯：0．5mm＝NC−0．5（P．634［14］） The ball-point pen which does notmove slightly which controlled "writing vibration" to concentrate on it without stress, and to write it. ●Ball diameter: A 0.5mm ● axis color: A black axis ● ink color: Black ● full length: 143.6mm ● axle diameter: 11.8mm ● extra lead: 0.5mm = NC -0.5 (P .634 [14])