A Section Rubber Drive Belt V-Belt Inner Circumference 450mm A450/A18 The outer fabric wrap is treated for oil and heat resistance. Specially designed, twisted, and heat and chemically cured neoprene rubber material. The body rubber compound is a highly engineered synthetic rubber compound. For agricultural machinery, engineering machinery, and work. Specifications: Material: Rubber Type: A450 Inner Circumference: 450mm Outer Diameter: 510mm Width: 13 mm Thickness: 9mm Also, I received this as a gift, so I don't know the details. I may not be able to answer your questions (т-т) Please check the actual photos and purchase if you understand. ☑︎ Immediate purchase is welcome! ☑︎ Only one available, first come, first served! ☑︎ Follow discount! ¥200 off items over ¥1500♪ ☑︎ Regarding "Like New" I have opened the item once to check its condition, but the contents are brand new✨ #YouMamaProducts 5-44