Description This Edison #6 18k Medium nib unit in Gold is a complete all-in-one nib and feed unit which screws into your Edison fountain pens that use a #6 JoWo nib unit. This Edison yellow gold 18k gold nib unit generally looks best in pens with gold trim. Please note: Edison is undergoing a rolling change in their gold plated and regular 18kt gold nibs - Two-tone nibs are being phased out in favor of Single-tone gold plated or single-tone 18kt gold. Some nibs are only available in single-tone gold, and the Two-Tone option is no longer available. If this is a concern, please email or call for more details.