These 18" x 24" pre stretched canvases in Arteza's 4-pack are the perfect surface for your next masterpiece. Each 18" x 24" stretched canvas in this pack comes pre-primed with three coats of cruelty-free (animal-friendly), nontoxic (acid-free) titanium acrylic gesso. Since these canvases are gesso primed they are ready to be used as soon as you receive them. Having your canvases pre-primed saves you the time, money, energy, and unnecessary hassle. Details: White 18" x 24" 1.6 cm profile 4 canvases Primed with acid-free titanium acrylic gessoNontoxic100% cottonFor use with mixed media