TWSBI Diamond Mini Fountain Pen - Clear twsbi alr is designed to be ergonomically

is designed to be ergonomically correct and is made of light weight anodized aluminum in a variety of colors

It's a lighter

Its lacquered metal construction gives the pen more weight

Refill: Universal Rollerball Refill

Paul Fisher was soon machining a new pen design shaped from solid aluminum

TWSBI Diamond Mini Fountain Pen - Clear twsbi alr is designed to be ergonomicallyTWSBI Diamond Mini Clear Fountain Pen. Transparent crystal clear diamond faceted barrel reveals the filling mechanism, a built in piston filler with a very smooth action, while also allowing an uninterrupted view of the ink level and color. TWSBI logo nicely finishes the top of the pen's cap. Rubber o ring on cap thread ensures an airtight seal to prevent ink drying out in the pen, while also ensuring that the cap is firmly attached when not in use.