XA5T003, BREMBO 4 PISTON MONOBLOC CALIPER. THIS CALIPER HAS AN INTEGRATED TOP BRIDGE FOR STRUCTURAL RIGIDITY. ALUMINUM PISTONS, STAINLESS STEEL HEAT DISSIPATION RADIATORS ON EACH PISTON, ALL INTERNAL FLUID PASSAGES. 180mm SPREAD FOR 12mm STUDS. STANDARD PAD THICKNESS IS 17mm WITH A 32mm THICK ROTOR, LH.