Faber-Castell Ambition Fountain Pen - OpArt White Sand - Medium. An impressive design with clean lines and selected materials. Visually appealing design with high functionality. The pen barrel is precious resin featuring a fine guilloche pattern. The geometric lines give the three dimensional effect. The writing instruments have spring-loaded metal clip and are chrome polished. The fountain pens come with high quality stainless steel nib and takes cartridge/converter for refills. The converter is available separately. A gorgeous pen for effortless writing experience.