TWSBI Diamond Mini Clear Fountain Pen - ClearThe lightest Diamond Mini The TWSBI Diamond Mini Clear takes the transparent mechanical appeal of the Diamond 580 series and makes it fully portable. The transparent barrel keeps the pen visually alive with your ink choice, while the smaller proportions make it feel more personal. Built around TWSBIs reliable piston filling system and fitted with a smooth stainless steel nib, this is a compact fountain pen that still feels complete in the hand. What