SAKURA
Sakura Pigma Micron (6-Pack)
Best for: Manga artists, graphic designers and journalers who need fine black lines

MARTCOLOR
A set of 10 black fineliner pens: nine nibs from 0.05 mm to 1.0 mm and one soft brush tip. The pigment ink is water based, waterproof and fade proof.
Best for: Manga artists, sketchers and letterers who want many line widths
The MARTCOLOR Micro Fineliners are ten black drawing pens with nibs from a very fine 0.05 mm up to 1.0 mm, plus a soft brush tip of 1 to 2 mm. The listing names manga, anime, sketching, technical drawing and lettering among its uses.
The ink is a water-based pigment ink, called archival in the title, that the listing describes as waterproof, fadeproof, non-bleeding and non-toxic. Each pen has a coded cap and a pocket clip.
Based on the manufacturer's Amazon listing.
The set includes 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8 and 1.0 mm nibs plus a soft brush tip of 1 to 2 mm.
The listing says the water-based pigment ink is waterproof, fade proof and non-bleeding.
Each pen has a coded cap and a pocket clip, so sizes are easy to tell apart and the pens are easy to carry.
MARTCOLOR lists the pens as compatible with pencil, watercolor paint, markers and highlighters.
The listing gives a 3 year manufacturer warranty.
Look elsewhere if: you want thick nibs for bold fills. The Muchcute Micro Fineliners (12-Pack) go up to 3.0 mm.
MARTCOLOR Micro Fineliners (10-Pack)
Choose it for: A very fine 0.05 mm tip plus a brush
Staedtler Pigment Liner (6-Pack)
Choose it for: Metal-clad tips
Muchcute Micro Fineliners (12-Pack)
Choose it for: Thick nibs for bold fills
SAKURA
Best for: Manga artists, graphic designers and journalers who need fine black lines
KOUSICOO
Best for: Doodlers, zentangle fans and comic beginners who want many line widths
TWOHANDS
Best for: Technical drawers, illustrators and journalers who switch line widths often