Got these on ebay. A 6" 4200 and a larger 7, maybe 8" 4202 both in obviously used condition but I've installed title bladders in each of them and they function as they should. I've included a picture of the pieces of the bladder that were inside the 4200. I had no idea that a speed bag bladder could dissolve into flakes over time. I'm guessing that's what happened.
![Confused](http://speedbagforum.com/forums/images/smilies/confused.png)
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