Great, loud and obnoxious squeekers! Our dog LOVES the Kong tennis balls, but when they stop squeeking they aren’t as much fun for him. He will go around the yard testing each one till he finds one that squeeks. After going thru about 4 dozen Kong balls, I saw these and thought I might make them last longer. These are a little larger than the original Kong squeekers so I use one side of some sharp scissors to reem out the squeeker hole by about 10% larger and push them in. He LOVES his “new” squeek Kong balls! I fixed about 20 so far Lol. I may add some hot glue or rubber cement around the edges of the new squeeker to prevent them from backing out with his vigorous squeezing. It only takes about 3 minutes to fix one. They really are obnoxiously loud and well worth the effort. My wife is annoyed by the loudness but I like the sound of my buddy having so much fun. They last at least as long as the originals do!