... , ISO/TS16949. 4. Good quality,low price. Details of IIR toy tire: Materials Comply with ROHS, IIR, or NR, Viton, EPM ... -alkali resistant, anti-corrosion, excellent air tightness, excellent damping property, shock proof, high Tensile strength, heat resistant, weather resistant, etc.Hardness ... the design based on your idea. Customized Rubber RC IIR Toy Tires