Asbestos mantle yarn is made of one hundred percent asbestos,it is suitable to tie with gas mantle in lantern,it must not broke or fall down when burning,it is bout 5000 meters per kilogram,the packing is 1 kg per roll with cardboard core and 25 kg per carton,the other packing is optional or according to the requirements of the customers. Color:white color Diameter:0.2-0.3mm Tensile strength:18 N Vector burn:20-21 percent Strand:only one