The Resin Series strikes the perfect balance between brass and acrylic, expertly crafted by Ystudio. It features a smooth matte finish that contrasts with the polished shine of brass. A brass inner tube embedded in the barrel provides the ideal weight balance. These new Ystudio products continue to deliver a unique writing experience. SPECIFICATIONS MATERIAL: Acrylic, Brass DIMENSIONS: 12×14×139 mm REFILL: 1 Schmidt 888F refill included; compatible with most standard rollerball refills