St Penpps Junlai 630 Seal Version Translucent Fountain Pen: 0.5-0.7mm/Stub Nib

Before shipping all Junlai 630 pens, Bobby will perform an additional sealing process, as the factory does not provide this service. Therefore, the one you purchased is the sealed version, which can prevent ink leakage. After normal sealing, it can last for about six months. Please understand that piston pens themselves also require regular maintenance, and the buyer may need to reseal it themselves afterward.As for how to maintain it, you can consult Bobby.

Only Barrel and grip are translucent and blind cap and cap are solid color, thanks

0.5-0.7mm is soft nib, when you write it with a little bit force, it is easy to be thick on writing size，
This pen nib doesn't have any size markings on it; its actual size is similar to a standard M nib from Europe or America. https://www.etsy.com/listing/4385059457/2pcs-size-8-junlai-630-fountain-pen-nibs?ref=listings_manager_grid. If you require other sizes, please order a replacement nib separately.
Stub nib is grounded nib, The writing thickness of nibs are 0.7-1mm. 1 mm is the thickest thickness, which is the thickness for vertical writing. However, in the actual writing process, you cannot only write vertically. When you write at an angle, the effective contact area between the pen tip and the paper surface will decrease. In fact, the thickness is about 0.8 -0.9mm. The thickness between M and B depends on the width of the polished nib top. Normally it is M thickness. If it is excessively polished, the distance between the nib top and pen feed will be too short, which will affect the aesthetics. Thank you. The angle of holding the pen is about 40-50 degrees, and the rotation angle does not exceed 30 degrees. Because the horizontal writing surface of the stub nib is relatively small, if you hold the pen too high or too low, and rotate the pen at an excessive angle, the entire writing surface will become distorted. Small, and may even scratch the paper. Thank you. If the angle you hold the pen does not meet this range, this nib is not suitable for you. Please take a photo of the writing angle. You need to customize the nib specifically for you. Thank you.

Packaging:
A pen, nib size is as your choosing