This is a set sale for one Mini 4WD car (8 rollers). The items in the image are what's being sold. Rollers only, the machine is not included. Item No: 95423 Mini 4WD Special Edition (Parts) Lightweight 2-Stage Aluminum Roller Set (13-12mm) (Red) [Parts useful for machine setup and performance improvement] This is a lightweight version of the popular 2-stage aluminum roller, which is frequently used in official races. The aluminum roller part has been lightened by 20%. The 2-stage aluminum roller supports the machine with the upper roller when the machine leans in corners, enabling stable cornering. The aluminum rollers have a red anodized finish. It also enhances the machine's appearance. Includes 520 bearings, brass spacers, and screws and nuts for installation. [Basic Specifications] Integrated 2-stage aluminum roller, with 4 x 520 bearings Item No: 95549 Mini 4WD Special Edition (Parts) Lightweight 13mm All-Aluminum Bearing Roller (Red) [Parts useful for improving machine performance and setup] This is a lightweight version of the popular 13mm all-aluminum bearing roller used in races. By adding 10 holes and changing the shape, the aluminum part has been lightened by 30%. The smooth rotation provided by the embedded 520 bearings is also attractive. The red color allows for color coordination with the body and chassis. Includes 2 bearing rollers, as well as screws and aluminum spacers for installation. [Basic Specifications] Includes 2 red anodized aluminum bearing rollers, 2 x 2x8mm screws for installation, and 4 roller spacers #Mini4WD #2StageAluminum #Lightweight2StageAluminumRollerRed