Reference: CLR
Brand: Uniball
Uniball UB-217 Refillable Liquid Ink 0.7mm Micro Roller Pen (Black Ink)
Refillable direct liquid roller pen 0.7mm Tungsten Carbide ball uni-ball 217 ensures smooth writing like the conventional uni-ball series but also can replace the refill. Write until last drop of ink. Able to check the remaining amount of ink through barrel window. Once you used up ink, you can replace with refill "UBR-87