Dimensions for use with aluminum wheels. Size may vary. Please be sure to secure with double-sided tape or similar before driving. This is a modified version of a Tamiya genuine product. Shipping will be via Yu-Packet Post. Will be posted within 3 days. Tracking information may not be reflected until the next day due to being dropped off at a post box. Please refrain from purchasing if you are sensitive to imperfections, as this is a handmade item. Please refrain from purchasing if you are not satisfied with the above. Thank you.