... polymer materials and hardening agent, which is suitable for emergency repair bike and electrical bicycle, motor bicycle, and ... 4 inch (diameter 6.35mm);2 Adoptable tire: emergency repair bike and electrical bicycle, motor bicycle, and ... Features for the Portable Tire Repair System: 1) Emergency help, prolong driving for 1000km ( 620 miles) 2 ... is made of zinc alloy. PFERD Emergency flat tire repair kit