Engine oil pressure sender unit - sends signal to 80 PSI oil pressure gauge. 0-80 Psi Single Station Oil Pressure Sender | Sierra18-5899 80 PSI pressure rating Single station 1/8 inch NPT thread size 10-32 stud terminal Works with US ohm scale oil pressure gauges Replaces Crusader 700425, R020001 Replaces Indmar 645002 Replaces Mercruiser 815425T, 8M0068784 Replaces Marine Power 456106 Replaces OMC 3857532 Replaces Pleasurecraft Marine R020001 Replaces Volvo Penta 3857532 Replaces Stewart Warner 279A Replaces VDO 360801