Staedtler signature mechanical pencil "925". Limited edition model from the 15" series. Available in 2 different widths of 0.3mm and 0.5mm for a cool 3-color lineup. 925 The 15" model is a mechanical pencil with a 9.2g total weight design that is suitable for drafting but also suitable for studying and desk work. Lead diameter: 0.02 in (0.5 mm) HB core Size: Height 5.5 inches (140 mm), Width 0.5 inches (12 mm), Thickness 0.4 inches (10 mm).