... Tensile strength:6MPA, 7MPA. Tyre flap factory. Supply butyl inner tube and natural inner tube. Tire flap 1100/1200R20Size1100/1200R20Weight3.0kgMaterials Natural ... can promise the long life.All newly produced tire flap, without any renew materials.All available sizes of tire ... of butyl inner tube, natural inner tube and flap.We specialize in manufacturing tire flap, car inner tube, truck inner tube, ...