Thiên Long PM04 Glass Pen

Thiên Long PM04 Glass Pen is a dual‑tip oil‑based brush pen from the Vietnamese brand Thiên Long, offering flexible nibs of 0.4 mm (fine) and 1 mm (broad) in blue, red, and black. Comes in a box of 10 pens, each with two oil‑based tips (0.4 mm and 1 mm).