Diameter .500 inch Diameter .750 inch Diameter .375 inch Diameter 1 inch Information on this site has been checked for accuracy and reliability. We are not responsible for errors, omissions, or unintentional misrepresentations. Warranty and liability for products purchased from Survival Motorsports is limited to replacement of the product or a refund of the purchase price, and is entirely at the discretion of Survival Motorsports. Prices are accurate as published, but we reserve the right to change them at our discretion without prior notice.