Push Button w/ boot
From Dakota Digital

Replacement push button for MCL-3000-OT, MCL-3000-R, MCL-3006-OT, MCL-3006-R, MCL-3200 Series, HLY-2000 Series, HLY-3000 Series and HLY-5000 Series gauges.
Replacement push button for MCL-3000-OT, MCL-3000-R, MCL-3006-OT, MCL-3006-R, MCL-3200 Series, HLY-2000 Series, HLY-3000 Series and HLY-5000 Series gauges.