... certificate is ECE,DOT,CCC and so on. 3.50-16 tires 1. High quality and competative price2. Outstanding gas tightness3 ... -5, 350-6, 300-8, 300-10, 350-8, 350-10, 400-5, 400-6, 400-8, 10*400-6, 10* ... -15, 600/650-14, 7.00-14, 7.00-16, 7.50-16, 225/250-17, 250-16, 250-17, 250-18, 250 ... , 250/275-18, 275/300-14, 300-12, 300-16, 300-17, 300/325-17, 300-18, 300/325 ... 120/70-12 etc. Butyl and Natural 3.50-16 tires