properties of 300-18 motorcycle natural inner tube 1.best tightness and wear resisitence durable quality 3.raw material: natural rubber and 35% rubber content 3.valve: TR4 4.weight: about 420g 5.packing: 1 pc in a polybag then 50 polybags a carton or a woven bag, special requirements accepted 6.payment term: T/ T way, 30% deposit, 70% balance payed after the shipment 7.brand: FU KUN oem accepted 8.delievery time: within 20 days ASAP other sizes: 225-17 275-14 250-16 250-17 250-18 275-17 275-18 275-21 300-12 300-16 300-18 300-19 325/ 350-16 325/ 350-18 110/ 90-16 410-18 other products: motorcycle butyl inner tube motorcycle tyre truck inner tube bicycle inner tube wheel barrow solid wheel rubber wheel sizes of our motorcycle tyres and motorcycle inner tubes 300-8 250-16 275-21 325-18 300-14 70/ 90-17 350-8 250-17 300-16 350-16 90/ 90-10 100/ 90-10 400-8 250-18 300-17 350-18 90/ 90-12 100/ 90-16 300-10 275-14 300-18 410-18 90/ 90-18 70/ 100-19 300-12 275-17 300-19 400-12 100/ 90-19 80/ 100-21 350-10 275-18 325-16 450-12 90/ 100-16 225-17 sizes of motorcycle tubeless tyre 300-10TL 300-18TL 110/ 90-16TL 400-12TL 350-10TL 90/ 90-10TL 130/ 70-12TL 300-8TL 400-12TL 90/ 90-18TL 120/ 70-12TL 130/ 90-12TL 275-18TL 110/ 90-10TL 130/ 60-13TL 90/ 90-12TL about us we are a factory supplier of motorcycle inner tubes with many years of exportation experiences and expansive market all over the world. advanced facilities, skilled engineers, spirit of being responsible, strict management combined with years of experiences creat our world-class level products with the certifications of ISO9001: 2000 SONCAP CCC etc markets Colombia Mexico Peru Canada Brazil Poland Venezuela Spain Ukraine Pakistan Italy Iran India Taiwan Greece etc we welcome you to come for a visit and look forward to cooperating with you