Features: These pen refills perfect for those who need frequent modifications. Suitable for student, teacher, office worker, and anyone in need of practical writing tool. Crafted from plastic, these gel pen refills offer both heat resistance, convenient to write and easy to erase. With their disappearing feature and easy erasability, widely used for writing, drawing, drafting, DIY craft, etc.Suit for erasable gel pen, rollerball pen, etc. These erasable pen refills great for educational institutions, workplaces, and studios. Enjoy smooth writing experience with the convenience of easy erasing. Improve your writing experience with these erasable pen refills. these disappearing pen refills provide the flexibility to make change easily. Specifications: Material: Plastic Inks Color: Redness; Black; Orange; Dark Blue; Purpler; Blue Size: Approximately. 13cm/5.12in Weight: Approximately. 200g Package Includes: 100Pieces Erasable Gel Pen Refills note: 1.Please allow 0-1cm error due to manual measurement. make sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color