Pen Material: Diamondcast material from McKenzie Resin Trim: Gold Nib: Stainless steel #6 size made by Nahvalur Filling Mechanism: Piston filling (bottled ink only) Pen Length, Closed: 5.9 in. / 149mm Pen Length, Open (Cap Off): 5.24 in. / 133mm Pen Length, Open (Cap Posted): Cannot be posted Pen Barrel Diameter: 0.51 in. / 13mm Pen Grip Section Diameter: 0.39 in. 0.45 in. / 10mm 11.5mm Pen Weight: 1.06 oz. / 30.0g Gift boxed with user guide and 1 year warranty