This kit is used for testing oil pump pressure and detecting faulty oil pressure switches and warning lights. Complete with large gauge with oil primed flexible hose and supplied with quick coupling adaptors for speed and security. Used for testing oil pump pressure, as well as for detecting faulty oil pressure switches and warning lights.Kit includes oil primed flexible hose with large gauge & 10 quick coupling adaptors. Adaptor sizes: R1/8 DIN 2999, 1/8-27 NPT, 1/4-18 NPT, 3/8-20 UNF, 1/2-20 UNF, M10x1.0, M12x1.5, M14x1.5, M16x1.5, M18x1.5. Max pressure: 10 bar (140psi).