Auto Meter 2259 Electric Cylinder Head Temperature Sender 1/8 inch NPT replacement for short sweep electric cylinder head temperature gauges and for gauges using sender 2258 in shallow depth areas Only works with 1995 and later gauges Can also be used for short sweep electric water, oil and trans temperature gauges where sending unit clearance is an issue Sending unit thread size is 1/8''-27 NPT It is sold individually