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Zebra JSB-0.5 Gel Ink Pen Refill - D1 - 0.5 mm - Black

  2.7  6 reviews | Write a Review

Zebra JSB-0.5 Gel Ink Pen Refill - D1 - 0.5 mm - Black - ZEBRA RJSB5-BK
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One pen refill component only. Customizable body and pencil component refills available separately.

Mechanical pencil components are available in: 0.3 mm, 0.5 mm and 0.7 mm.
Pen refill components are available in a: 0.4 mm, 0.5 mm, and 0.7 mm sizes and in a variety of colors.

Meet the incredible pen that has been a hit success among professionals in Asia. The Sharbo X is really about choice. The freedom of choice to choose your own pen body color, pencil lead size, ink color, and pen tip size. The diligent accountant might want a matte black body with a 0.3 mm pencil, 0.4 mm Blue Black pen and 0.4 mm Carmine Red pen. The architect might prefer a silver body with a 0.7 mm pencil, 0.7 mm Ever Green and 0.7 mm Black ink pen. Whoever you are, this is the pen that can be customized for your needs.

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Off Black Inks

Model NumberZEBRA RJSB5-BK
Weight0.0 ounces
Tip Size 0.5 mm
Tip Type Conical


October 1, 2012
I was shocked at how...
Verified Purchase
I was shocked at how amazing it was to write with this; it made taking notes tolerable, and almost enjoyable! Unfortunately, I can't say the same thing about the longevity of the refill. I start off the day with a new refill, and sure enough, about 3/4 of the way through my last lecture every day, black-gray-white... scribble, shake, scribble... nothing. It is so disappointing to enjoy using my awesome Sharbo X so much, only to find out that it takes around $3.00 per day to use it. If I don't find another place to buy the ink, I'll regrettably have to start using another pen of less quality.

4 people found this helpful
September 14, 2011
I love the dark smooth...
Verified Purchase
I love the dark smooth lines created by this refill, but i found that within one or two days of using it, it started to bleed out the tip in small increments. This bleeding would cause blotches on my paper that were undesirable. I keep the pen in my pocket and I feared a larger bleed that would ruin my pants, So I discontinued the use of this refill. I recognize that it may have been that i got a defective refill, and i will attempt to use the second one that I bought at the sametime and hopefully have better results.

2 people found this helpful
October 3, 2011
This is a smooth gel...
Verified Purchase
This is a smooth gel pen that is comfortable to write with. However, it runs out of ink in no time! (I'm writing thesis notes on a Black n' Red 8x12" notebook, and the refill runs out in 4-5 pages.)

1 person found this helpful
March 2, 2011
Writes well, but runs...
Verified Purchase
Writes well, but runs out EXTREMELY fast. I'm a student, and I noticed that even before 4 lectures that are around 1.5 hours each, the ink had run out. I'm starting to second guess my Sharbo purchase. The look, feel, and function of the pen are great, but the constant refills just seems unsustainable. We'll just have to see over time.

2 people found this helpful
January 9, 2015
The best Personal preference:...
Verified Purchase
The best

Personal preference:
Best: JSB
Second best: ESB and Jetstream
OK: Sharbo X D1 and Plantinum D1