Title: Option: Repair rather than replace
Product review: My Everlast 4210 speed bag wouldn't hold air, and I found this bladder while looking for a replacement. Then, it occurred to me, a bladder is just like an inner tube! So I removed the old one, found the leak by holding the old bladder under water, and looking for bubbles. It was a very small hole. I used a small piece of black electrician's tape and E-6000 glue, let it dry over night, and Voila! I have a good bladder and a good speedbag again. Give it a try. Good luck!
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