Inner Tube Size: 3.00-10, 3.50-10, 3.00-12, 2.75-14, 2.25-17, 2.50-17, 2.75-17, 3.00-17, 3.25-17, 3.50-17, 2.50-18, 2.75-18, Inner Tube1.Size: 3.00-10, 3.50-10, 3.00-12, 2.75-14, 2.25-17, 2.50-17, 2.75-17, 3.00-17, 3.25-17, 3.50-17, 2.50-18, 2.75-18, 3.50-18, 3.75-19,2.Certificate: ISO9000, CCC.Please contact me for more information and our quotation. Inner Tube