For GMC V3500 1990 1991 Disc Brake Rotor | 38.99 mm. / 1.54in. Nominal Thickness
Product Info: Part: Disc Brake Rotor Color: Silver Rotor Style: Drilled and Slotted Center Hole Diameter: 127.2 millimeters / 5.01 inches Discard Thickness: 37.21 millimeters / 1.46 inches Nominal Thickness: 38.99 millimeters / 1.54 inches Outside Diameter: 327 millimeters / 12.