These brake pads are all the original brake pads for OTK karts. These karts include Tony karts, Kosmic karts, Exprit karts, FA karts, Redspeed Karts and the all new EOS kart. There are brake pads for front calipers and brake pads for rear calipers. All brake pads models here: BSD, BSM, BSM4, BSM5, SA2, SA3, BSS, BS5, BS6, BS7. You will also find all spacer that we sell for brake pads calipers.