Add to your assortment of nib sizes or replace a nib that took a high dive off your desk with the TWSBI (commonly pronounced "twiz-bee") replacement nib unit for the Diamond 580 fountain pen. It is also backward compatible with the Diamond 540 and 530 generation pens. This nib unit includes the stainless steel nib, plastic feed, housing, and transparent resin grip section. The nib is packaged in a convenient holder to store the nib when not in use.
TWSBI 580 Stainless Steel Replacement Nib Unit Specifications
Type: Replacement Nib Unit
Material: Stainless steel and plastic
Compatibility: Fits TWSBI Diamond 580, 540 or 530 Fountain Pens
Packaged in a holder to store the nib when not in use.