Difference between Deli 103105 Neutralizer Pen

The difference between Deli 103 and Deli 105 gel pens is the thickness of the nib and the smoothness of writing. The Deli 103 Neutralizer Pen has a relatively fine nib, which is suitable for detailed writing and drawing, while the Deli 105 Neutralizer Pen has a relatively thick nib, which is suitable for fast writing and marking. This is because the thickness of the nib directly affects the flow of ink and the feel of the pen when writing.

In terms of expansion, apart from the difference in nibs, there are other factors that can also affect the writing experience of a unisex pen. For example, the quality and formulation of the ink, the grip of the pen barrel, and the weight of the pen. A good unisex pen should have even and smooth ink, comfortable grip and moderate weight, all of which affect the user's comfort and experience when writing.

So, when choosing a unisex pen, you can select the right model for your writing needs and personal preferences, and also try different brands and styles of unisex pens to find the one that best meets your writing style and experience needs.