Compatible with Traxxas HSP Redcat Tamiya axial SCX10 D90 HPI 110 RC cars. Light weight, small size, easy to carry. Smooth, shiny metal surface without burrs Easy to install and durable. specification: Material: aluminum alloy Quantity: 4PCS Colour: Blue Magnet diameter: 15mm; Bracket hole diameter: 6mm. Height: 23 mm. Weight: 35g 4PCS The package includes: RC car magnetic Invisible Body Shell 4Pcs