These pastel pencils are ideal for fine and commercial artists. Their intense pigmentation provides excellent performance on thin paper and strong color gradations in application. Light-proof, nontoxic, break-resistant, blendable and partially soluble (contours will remain visible). A fixative is recommended on finished pieces.Details: Includes assorted colors 4.4 mm lead diameter 6 packs (24 pencils per pack, 144 total pencils) Light-proof Nontoxic Aquarellable Break-resistant, blendable and partially soluble