... air tightness 4. high heat-resistant 5. ageing-resistan 1 Truck inner tube tire has good elongation rate,pulling strength from ... as flow: 1200-24, 1200-20, 1100-22, 1100-20, 1000-20, 900-20, 825-20, 750-20, 700-20, 650 ... inner tubes.3 Certificates: ISO9000 CQCMore information, please contact me. Truck inner tube