I use two. The first is the long stick type from NAPA that allows me to check the inside dually. The second is a dial meter with a bleed button that I use to set the air bags on my truck. I picked it up on Amazon several years ago. It's dial is ruberized and has a 9" or so flexible hose.
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2012 Dodge C3500 DRW 4x4 Long Box, WeatherGuard 90 Gal transfer tank, B&W Companion Hitch
2012 Keystone Montana 3100RL, 520W Solar, 460AH batteries, Morningstar MPPT 45 CC, Bogart 2030RV monitor.
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