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Quantity
1
Description
The TWSBI Diamond 580 comes with a benchmark piston ink-filling mechanism and has all detachable parts.
This fountain pen features a clear demonstrator body with rainbow-colored iridescent trim and a stainless steel nib accented with irides...
Reviews
5.0
74 ratings
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1
Struck by the color and how smooth it writes. I don't know much about pens because this is the second one I ever bought. It is way smoother and not as scratchy sounding than my other one.
T
Tom · June 19, 2026
Not just pretty to look at!
Absolutely love this pen so far! Aside from just being plain pretty to look at, it feels well balanced in my hand and writes like a dream. I opted for a medium nib, as I sometimes find fine nibs to be a bit scratchy or affect the ink flow, after a week solid of daily use, this pen is becoming the one I reach for more than my other fountain pens!
C
Candice · May 15, 2026
So far so smooth! Using with Lamy dark lilac. Nothing negative to say so far.