12 pack u.s art supply 18 inches by 24 inches professional quality canvas panel acid free Art Supplies

12 Pack of U.S. Art Supply 18" x 24" Professional Quality Canvas Panel Acid-Free 100% Pure Cotton Artist Canvas mounted onto Acid Free Heavy BoardTriple Acrylic Gesso Primed for Oil or Acrylic Painting8-Ounce Finished Weight with Turned EdgesAcid Free - Archival Quality - For All types of MediaGreat for Students and Professional... 12 Pack of U.S. Art Supply 18" x 24" Professional Quality Canvas Panel Acid-Free