10x Mitsubishi UNI-BALL Uniball Eye Micro UB-150 Gel PEN BLACK BLUE RED Japan

Uni Super Ink (Permanent, Waterproof, Fadeproof). Set of 10 Mitsubishi Uni-Ball UB-150 Eye Micro Pens, Made in Japan. Colour: Assorted. Micro 0.5mm tip. It writes a relatively thin line. The Uni-Ball Eye Micros tend to last about 20,000 - 40,000 words depending on the size.

eBay