Unprimed canvas rolls are made for artists who need versatility in sizing and the choice to use many different mediums by being able to prime their own canvas exactly as they prefer. Cotton rolls are 100% unprimed cotton canvas specifically woven to rigid specifications. Linen rolls are 100% raw linen canvas with medium weave and weight. 54" x 30yd roll. 138 linen coarse 9oz. unprimed.