I installed a Level Master on my previous trailer. After a couple years the ball gunked up and gave inaccurate readings. I replaced it. The second one did the same thing after a couple of years use.
I would not purchase and install another.
I hope you have better luck with the product than I.
'13 Excel Winslow 34IKE
'12 GMC Sierra 3500HD
Previous RV's: '03 MobileScout Titan 29DBS; '01 Sunnybrook Lite 2708 SLE; '99 Coleman Utah
Previous TV's: '02 Chevy Suburban 2500 8.1 4.10; '99 Chevy Express 1500 5.7