Gullor 9076 Giraffe Medium Nib Fountain Pen - Black Classic Smooth Writing Pen. Nib size: Medium Works with International Ink Cartridges. Ink cartridges are not included for safety. You may refer to the matching cartridges with ASIN B011QW2R7Y Cap: Push type. Material: Metal 100% Satisfaction Guarantee - before you leave us any feedback, please message us to make things right to you - we care and we will make sure we do everything we can to make you happy with our products.