UM-100 (05)

Tip: Stainless steel

Ball: 0.5mm tungsten carbide ball

Barrel: Plastic (AS)

Ink Colour: 6 colours (Black, Blue, Red, Blue-black, Green-black, Brown-black)

Ink Refill: UMR-5N (2 colours/Black, Blue)

• When the pen is positioned in a downward position, the ink flows smoothly from the ink flow channel.
• When the pen is positioned in an upward position, the reverse flow prevention ball works to stop the flow of air into the ink.