Sir, I ordered and received a 7897 a ball joint kit last week. It arrived last week. I purchased this from Amazon on line. In preparation to replace the ball joints on my F150, I attempted to rotate the end housing that sets on top of the ball joint. I would not move. Upon further investigation there was a piece of rubber wedging the pieces together. I pulled the end piece off and the "O" ring fell out in three pieces. I called the customer service and was politely requested to email my proof of purchase. Yea, like I keep all this documentation. All this hassle for a "O" ring!. Give me a break. So now I'm getting just a bit agitated and drove to my local NAPA dealer and walked out with "two" "O" rings. I did not requires the whole part number #7897-05. Just the darn "O" rings. Thanks Astro.