Made of material with a sense of rigidity to ensure reliable performance in racing scenes. Polish BK *Polish processing only *Clamp diameter: 1.3 inches (31.8 mm). Material: 6061 T-6 double bated. *Width: 14.2 inches (360 mm), 15.7 inches (400 mm), C-C). *Catalog value: 130, 7. 0 mm *Product color The actual product may look different from the published images depending on your display type. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Thank you for your understanding.