1.使用的墨水通过ASTM D-4236国际安全标准测试
2.笔的色彩艳丽,经久不褪色,更适合办公中进行标记、提示等用途;
3.pp料制做的笔杆和笔帽确保使用寿命长
4.笔尖锁定装置,即使承受庞大书写压力,笔尖仍能不变形.
1. The ink can pass ASTM certificates
2.Colorful and fade-less, suitable for mark notes
3.The PP material made barrel and caps have long usage life