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Diplomat Optimist collection is contemporary and eye-catching without being over stated. Each pen is finished in a high gloss black lacquer with intersecting metal checks giving a stunning visual effect. The Optimist collection are available in three patterns and as ball pens or fountain pens each accepting standard refill types. Diplomat Optimist Rhomb Fountain Pen comes fitted with our precision Stainless Steel Nib. You get an option to choose from Fine and Medium. Standard international cartridge or converter can be used (both are included).