Which is the refill of Dongmi 0 12 or 007?

The refills of Dongmi 0 12 and 007 are of high quality, which are smooth, durable and unbreakable. However, their refill specifications are different. The refill specification of Dongmi 0 12 is 0.5mm, and the refill specification of Dongmi 007 is 0.7 mm ... So which one to use depends on personal preference and use demand. If you like thinner lines, you can choose Dongmi 012; If you need to draw a thicker line, you can choose Dongmi 007.