1 :100 pieces of 1.0 mm retractable ball pen refills blue(Please open the trial),the length measures about 10.7 cm/ 4.2 inches,（Note: It looks like black ink, but it is actually blue ink,safe to use）
2 : Ballpoint pen refill 1.0 mm,Be fit for ballpoint pen with spring,Writing fluency and clear lines,Try the 100 blue ballpoint pen refills you bought patiently, and you will like them very much.
3 ：Ballpoint refills 1.0 mm nib blue, and the blue ink inside has high color rendering and even flow, the Pen refills is durable and writes smoothly.
4 : Pen refills with spring can be used in retractable ballpoint pens and other same size pens, suitable for school, workplace, classroom etc.
5 ：The quality of the ballpoint pen core is guaranteed, and each pen tip has been sealed with wax to prevent ink from overflowing before use.
6： Please read the length and picture of the refill carefully before buying,Avoid buying the wrong one and delaying the use.
