The Vacuum Power Brake Booster 54-71085 is designed to fit 1997-2000 GMC Yukon K1500 K2500 vehicles. This brake booster is made of steel and includes a booster and instruction sheet. It has a housing diameter of 10.812 inches and a diaphragm diameter of 10.40 inches. The product is manufactured by Prostop and comes with a 5-year manufacturer warranty. Additionally, it is a California Prop 65 Warning product and is suitable for specific Chevrolet and GMC models from 1997 to 2001.