This is a high-end oil-based ballpoint pen equipped with Acro Ink, featuring a design that evokes the smooth writing feel of Acro Ink, with the shape of the shaft and clip. The Acro Ink used in the Acroball reduces the viscosity to 1/5 of that of a typical oil-based ballpoint pen, resulting in an ink that flows smoothly, similar to water-based ink, allowing the ball to rotate smoothly. Because Acro Ink has a low viscosity, the ink supply to the pen tip is abundant. The ink penetrates deep into the paper fibers, resulting in a dense, even writing line. Twist-retraction type Material: Brass Retail price: 3,300 yen Acro Drive Oil-based A ballpoint pen featuring a slim body with gold-colored metal fittings. - Metal fitting color: Gold - Design: Slim body - Features: With clip Thank you for viewing. Acro Drive Oil-based Ballpoint Pen Gold Writing Instrument Stationery Twist-retraction type Pilot A gray metal ballpoint pen with a simple and elegant design. - Color: Gray - Material: Metal - Design: Simple and elegant - Clip: Gold-plated - Body: Matte finish Thank you for viewing.