Helps to diagnose worn oil pumps and engines, faulty oil pressure switches and warning indicators. Large clear dual scale gauge. Quick coupling adaptors with shut-off valve for speed and security. Permanently oil primed including a long flexible hose. Set includes: R1/8'' DIN 2999, 1/8'' x 27NPT, 1/4'' x 18NPT, 3/8'' x 20UNF, 1/2'' x 20UNF, M10 x 10, M12 x 1.5, M14 x 1.5, M16 x 1.5, M18 x 1.5 and a 90