Boot. Left.W/HYBRID. Rear. Right.W/HYBRID. W/ELECTRIC PARKING BRAKE. A rubber boot used to protect the disc brake Caliper Guide Pin from dirt, debris and moisture to prevent corrosion. Disc Brake Caliper Pin Seal. Manual Operated Parking Brake. Part serviced with brake pads. Included with: Caliper, Caliper assembly, Guide, Part is included with Caliper.