This manifold gauge set is made of aluminum. It includes three black chrome hoses that measure 60 inches length, two ball valves, and a 3/8 inch vacuum port. The gauge set has an accuracy of +/-1% with high side red ranging from 0 to 800 PSI and low side blue ranging from 30 inches HG to 500 PSI. It is suitable for use with multiple refrigerants and meets the UL/SAE standards.