Graf Faber-Castell Classic Sterling Silver Mechanical PencilThe fluting the filigree groove structure is the defining design element of the Classic line. The writing instruments in the Classic Sterling Silver collection are, unsurprisingly, crafted in solid 925 sterling silver lending a shining, flashing quality to the fluted barrel of the items in motion. Barrel and metal parts made of solid 925 sterling silver Hallmarked grip, end cap and cap Solid, spring loaded clip Break resistant lead, 0. 7 mm, hardness