This is a high-quality, German-made stainless steel #5 nib and is compatible with the fountain pens listed above. Do not grasp the nib by the sides as this may damage the nib. The nib can be replaced by gripping the old nib at the bottom and top with a cloth and holding the grip piece with the other hand and then unscrewing it. Grasp the new nib with a cloth and screw it back in.