Got them in one day for my Honda 07 van which was making a TERRIBLE whining from the power steering. My brother in law works as a shade tree mechanic and it seems there are a large number of videos online about this very problem and the solution is to replace those o-rings. First, they were delivered on the day two days of Prime were expected, so it was nice to get them before work started so I could see them. Second, they are SMALL. I mean kinda like those little hair ties you use for little girl half length braids. The size of the tip of the little finger. The size doesn't matter in this case because they fit perfectly and the problem is easy to solve if I went crazy here that I would have to replace the entire pump. nope! 5 bucks and some elbow grease and my van is humming quietly again.