You can test a wide range of lead diameters.
EnerGel ink line includes 5 different types of 0.3mm, 0.4mm, 0.5mm, 0.7mm, 1.0mm.The built-in core of the main unit is 0.02 inches (0.5 mm), but it can also be changed to other lead diameters.You can change it according to your writing style.For small notebooks, the core diameter is 0.01 inch (0.3 mm) and the carefully selected 0.02 inch (0Standard size 0.5 mm, bold 0.7 mm, and 0.04 inch (1.0 mm) when you want to display the text securely.In addition to black, red, and blue, the ink colors also include blue black, turquoise blue, orange and color lineup.There are many combinations.