An impressively designed fountain pen with a built-in piston ink filling mechanism. TWSBI Diamond 580ALR Caribbean w/Onyx Fountain Pen Modern industrial design meets traditional handwriting in the most ingenious way. Transparent body made of high-quality anti-fog material. A playful contrast of intense blue tones. Increased ink capacity for maximum writing autonomy. High-quality engraved stainless steel nib. Screw-on cap with the distinctive TWSBI logo on the top. Sturdy chrome-plated clip and a well-designed central ring. TWSBI includes in the packaging all the necessary tools for full disassembly and cleaning of the pen, offering its owner the unique advantage of understanding how this exceptional writing instrument works. Pen length with cap posted: 17.6 cm. Closed length: 14.1 cm. Weight: 28 grams. Presented in a beautiful and secure gift box. The word TWSBI comes from the reversed initials of the phrase "San Wen Tong." In Chinese, it means “Hall of the Three Cultures.” Emperor Qianlong built a monument to house the three great masterpieces of Chinese calligraphy. The word "BI" in this vast country signifies the magic of writing instruments. From this unique symbolism, the name of these remarkable objects was born. Pronounced Twiz-bee!