5x7 Artist Canvas Panel No Warping MDF Board 12Pack

12 pieces of No-Warping canvas board individual packed - MDF(medium-density fiberboard) made backingboard, 4mm thick, when heavy-duty painting, this board Does Not warp like paper-board . ACID-FREE - Triple acrylic gesso primed, acid-free, non-toxic. Ready for painting. Cotton canvas- 100% cotton, medium texture. 8oz primed. Versatile canvas panel - Perfect for painting of different media and techniques.  Bulk value pack - 12 pieces of canvas panels. Size: 5 x 7 inch.