Have been using them for over 20 years, they work great. The one with the blue automatic check in the middle works great and doesn't leak. If you get others that have the spring on the outside, they will spill and leak fluid, making a huge mess. I've added two photos, the first being what I had before which was just a dust cover and then two with the buddy bearing installed. Works great as always, it's for fresh water, only if you put them in salt water they will rust and corrode and won't work properly. So if you're going to use them for saltwater, make sure you get a stainless one.