RK DESIGN STUDIO: Original footrest compatible with current 3/4 series (G20 series), M3/4 (G80 series), 2 series coupe (G42), M2 (G87); Footrest is designed and manufactured in Japan at a domestic factory; Surface is stainless steel (0.05 inch (1.2 mm) thickness: hairline finish); Back side is plastic (3.5 mm) with strong double-sided tape (base: plastic (3.5 mm). waterproof acrylic). No tools required for installation and easy replacement. Taped on allows for easy removal without damaging the vehicle when rearranging it.