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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

At 118mm capped, 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 (140mm) 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.

Details that make the difference

This AL edition features aluminium parts that add a cool, refined touch and a little more heft than the standard 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 Medium or Broad
• Body material: Clear resin with mint blue accents and chrome trim
• 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, 13mm diameter, 23g weight (cap 9g, barrel 14g)
• 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.