Multipens are great - they're often no bigger than a normal pen, but contain more than one pen! There are all sorts of different multipens, but if you usually write in black ink but sometimes need red, and occasionally need a pencil, a multipen can do it all in one. Or perhaps you want four different colours for mind-m
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The 4–in-1 pen is made of metal, a multifunctional ballpen with blue, red and black D1 standard refills, mechanical pencil 0.7 mm and eraser.
Ballpen Multipen 4-in-1