The OTC 5613 Vacuum and Pressure Test Kit is designed for diagnosing vacuum lines, components and low pressure fuel systems. It helps pinpoint issues such as cracked lines, PCV problems, fuel pump concerns and clogged filters. The kit can also diagnose internal engine problems including worn rings, leaking valves and failing head gaskets. A large 3.5 inch dual purpose gauge reads both vacuum and pressure with dual scales of 0 30 in Hg, 0 70 cm Hg, 0 15 psi and 0 100 kPa. The chrome bezel and rugged protective boot provide durability, and the included adapter fits most applications. Built for professional technicians, this kit delivers accurate and reliable diagnostic capability.