This is an oil hose for turbo installation on Nissan.
The product is supplied with flanges and oil hose for the turbo and oil sump.
These engines use M12x1.25 for the oil feed from the engine:
S13 Silvia "SR20DET", RPS13 180sx "SR20DET", S14 Silvia "SR20DET", S15 Silvia "SR20DET", RNN14 GTiR "SR20DET", T30 X-Trail "SR20VET", U12 Bluebird "SR20DET", U13 Bluebird "SR20DET", R32 Skyline "RB20DET", R32 Skyline "RB26DETT", R33 Skyline "RB25DET", R33 Skyline "RB26DETT", R34 Skyline "RB25DET", R34 Skyline "RB26DETT"