HF refuses to spend an extra 50 cents and use u-cup seals so that it won't last and will need to be replaced via planned obsolescence in 10 yrs of minimal homeowner use - .because they know when it fails that person will go back to HF and buy a new one . I've scrapped at least 5 HF jacks with minimal homeowner use in 25 yrs: 2 floor jacks at 5-10 yrs ea, 2 bottle jacks on my 12T press, and the jack was bad on my engine hoist out of the box. I'm not a HF basher .but they **** for jacks. I now have a HW and an AC floor jack