BL538活动铅笔，铅芯规格0.5mm和0.7mm
双按出芯，彩色笔杆，金属笔夹，电镀笔尖。
BL538 mechanical pencil
perfect for advancing leads in top mechanism.
smooth writing lead does not smudge.
metallic cilp with eletroplated end plug and top part.
Available in 0.5mm and 0.7mm leads
