New 7" zinc plated power brake booster. This 7" power booster is hand polished before a yellow zinc finish is applied for a top quality finish. The top quality power brake booster is designed mount directly to your factory firewall. Designed to work with most aftermarket master cylinders and some factory master cylinders, Master Cylinder Bore Size: N/A, Bowl Design: N/A, Master Cylinder Material: N/A, Master Cylinder Finish: N/A, Reservoir Included: N/A, Reservoir Material: N/A, Master Cylinder Cap Included: N/A, Brake Booster Type: Single Diaphragm, Brake Booster Diameter (in): 7 Booster Material: Steel, Brake Booster Finish: zinc, Brake Pedal Rod Extension Included: Yes, Mounting Hardware Included: Uses Original, Quantity: Kit.