New 1-1/8" bore chrome flat top power brake Corvette style master cylinder with left side outlets, 9/16-18 and 1/2-20 outlets, Master Cylinder Bore Size: 1-1/8 in, Bowl Design: Dual, Master Cylinder Material: Aluminum, Master Cylinder Finish: Chrome, Reservoir Included: Yes, Reservoir Material: Aluminum, Master Cylinder Cap Included: Yes, Quantity: Each, Notes: For use with most power brake systems.