TWSBI Diamond Mini AL Fountain Pen – Mint Blue | Compact Piston-Fill Fountain Pen

Big performance in a small package — the TWSBI Diamond Mini AL in Mint Blue takes everything fountain pen lovers appreciate about the Diamond series and shrinks it into a pocket-friendly size, without cutting corners on quality. If you're searching for a compact fountain pen, a travel-friendly piston-fill pen, or a beginner fountain pen that still feels genuinely premium, the Diamond Mini AL is built for exactly that.

Small size, serious engineering

About an inch shorter than the standard Diamond 580, the Mini is designed to slip easily into a bag, pencil case, or even a shirt pocket, while the cap simply screws onto the back of the barrel while writing — so nothing gets lost, and the pen becomes full-sized again the moment you post it. Despite the compact build, it keeps the same true piston-filling mechanism TWSBI is known for: twist the knob to draw ink straight from the bottle, no cartridges or converters needed, and enjoy a smoother, more traditional fountain pen experience with every fill.

Details that make the difference

This AL edition features an aluminium grip section and piston mechanism, adding a cool, refined touch to the hold and a bit more heft than the standard plastic version — useful for writers who prefer a slightly weightier pen. The clear resin body with mint-blue accents lets you watch ink levels and the piston mechanism at work, while the faceted barrel catches the light and helps keep the pen from rolling off your desk.

Quick specifications:

Brand: TWSBI | Model: Diamond Mini AL
Origin: Taiwan
Nib: Stainless steel — available in Medium or Broad (also offered in Extra Fine, Fine, and Stub sizes depending on stock)
Body material: Resin with aluminium grip section, clear and mint blue
Cap type: Screw-cap, postable
Filling system: Piston filler (bottled ink only, cartridges not compatible)
Ink capacity: Approx. 1.80ml
Dimensions: 118mm closed, 140mm posted, approx. 23g weight
Warranty: International TWSBI warranty

Who it's for: fountain pen beginners wanting an affordable piston-filler to start with, ink enthusiasts who love seeing their colours through a clear body, and anyone who wants a genuinely well-made travel or everyday-carry fountain pen that doesn't take up much space.

Why buy the TWSBI Diamond Mini AL from Makoba

Makoba stocks only 100% genuine TWSBI pens, each backed by international warranty support — so you know exactly what you're getting. We back that up with careful packaging, secure checkout, and a team that actually understands piston-fillers, nib sizing, and everyday fountain pen use. Shop with Makoba, and get the real TWSBI experience, sized down but never compromised.

Perfect for: everyday carry, travel journaling, ink testing, and gifting to someone just starting their fountain pen journey.

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