Description 100% cotton canvas 4 oz preprimed weight; 9 oz primed weight 58 thick stretcher bars; made of solid spruce wood Backstapled Tripleprimed with acrylic gesso AcidfreeAn economical option for students goodquality Blick Academic Cotton Stretched Canvas is backstapled for easier restretching The 58 thick stretcher bars are made of solid spruce wood The 4 oz cotton canvas is triplecoated with acrylic gesso for a primed weight of 9 oz Blick Academic Cotton Canvas is sold in packs of two