gel pen examination specific pen student with 0.5 carbon pen black pen water-based signature refill heart ballpoint pen 中性笔考试专用笔学生用0.5碳素笔黑色笔水性签字水笔芯心圆珠笔

one black piece one red piece one blue piece 1 box (12 black pens) 1 box (12 red) 1 box (12 blue pens) 1 frosted pen holder 100 black ones 100 red ones 100 blue ones 20 black ones black-100 original refill pens refill the pen cartridge

syringe tip 0.5mm bullet 0.5mm