Cell plastic, the first large roll in the picture, with a width of 150 cm, has a thickness of 12 mm and is in one roll about 45 meters long, total.estimated about 70 square meters,This roll has a 2-quality cellular plastic,but acts as insulation,for example,it is very heat-resistant,symbol plastic,efficient scrap and heat protection,including yard construction,and all kinds of thermal insulation. does not absorb water,it is tough,it does not crumble between the layers of ground,like hard insulating plates..Collections are easy to work on and can be well shaped around the insulated object..There are several reels;Smokers are sold at a time,as many warehouses are available!(Please check out other sizes if this roller is not suitable?)