Moeller Sending Unit, Reed Style, Electrical, for 13" Deep Tanks. Reed switch sendind units collect fuel level information more consistently than swingarm senders. They achieve this by taking the measurement from the float -which is still a moving part. However the fluctuation is much less because the range of motion is much less. Stainless steel construction provides efficient performance. A direct OEM replacement. Requires a dash mounted gauge. MOL-35727-10 (170548) or comparable gauge.