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We have own factory in Qingdao Lingang Industrial Zone. Quality is everything! High quality and durable long life use 2.excellent gas-tighten and heat resistance competitive price motorcycle inner tubes. "Quality comes first" is our principle to run the factory. "Honesty and mutual benefits" is our basis to do business. We are looking forward to cooperating and establishing long-term business relationships with friends from all over the world. 1) Outstanding gas tightness. 2) Bear the moisture-penetrability. 3)Good quality and competitive price Size as following: sizeweight(g)225/250-17380225-14260225-16310225-17330225-18350225/250-17380250-4180250-14300250-16320250-17340250-18360250/275-14360250/275-17400250/275-18420275-14350275-16380275-17400275-18420300-8320300-10350300-14400300-16420300-17460300-18480300-19500325-16520325-17540325-18560325(90/90)-18580350-8340350-10360350-16580350-18620400/375-19780400-8350400-12650400-19820450-12680500-12720600-12800130/60-13600130/90-15780110/90-13520110/90-1668090/90-1849080/90-18460 wheel barrow tube: sizeweight(g)250-4300-4300-83.25/3.00-8325-8350-41804.10/3.50-41803.50-53.50-63.50-73.50-8400-4400-6400-7400-8200 x 50Enjoy your life with our products:) Waiting for your inquiry:)