IDEAL Swap out the pencil leads for varying projects. PREMIUM Faber-Castell are globally renowned and loved. They are the world leading manufacturer of top-quality, innovative art materials. They have become the go-to brand for artists for centuries, whether professional or hobbyist. SUITABLE This pencil lead is easily erasable and does not produce any dust. The break-resistant and exceptionally smooth leads for refilling the FC clutch pencils are deep black, blue printable and can be easily erased. Available in 11 degrees of hardness. The grades 4H to 3B have a lead diameter of 2 mm, 4B to 6B have a lead diameter of 3.15 mm.