PU tire (Solid pu tire, Pu filled type) it is free of air inflation, abrasion proof, anti-corrosion ... , harmless even in nail pric PU tire (Solid pu ... tire, Pu filled type)1)it is good in resillience and can ... to water, oil, dirt, acid and alkali. PU tire (Solid pu tire, Pu filled type)