This Cass Art Oil & Acrylic pad contains 12 sheets of 250g acid free paper. Treated with a sizing agent that offers the right absorbency and grip for acrylic paint and internally sized to prevent oil paint from sinking through. Ideal for any oil & acrylic techniques (smooth or heavy body). Use with oil & acrylic paints and brushes. Perfect for students, hobbyists and artists. Available in A4 and A3 sizes.