2C x 1 sq.mm, 3C x 1 sq.mm, 4C x 1 sq.mm, 2C x 1.5 sq.mm, 3C x 1.5 sq.mm, 4C x 1.5 sq.mm, 2C x 2.5 sq.mm, 3C x 2.5 sq.mm, 4C x 2.5 sq.mm, 2C x 4 sq.mm, 3C x 4 sq.mm, 4C x 4 sq.mm, 2C x 6 sq.mm, 3C x 6 sq.mm, 4C x 6 sq.mm, 2C x 10 sq.mm, 3C x 10 sq.mm, 4C x 10 sq.mm, 2C x 16 sq.mm, 3C x 16 sq.mm, 4C x 16 sq.mm, 2C x 25 sq.mm, 3C x 25 sq.mm, 4C x 25 sq.mm, 2C x 35 sq.mm, 3C x 35 sq.mm, 4C x 35 sq.mm
