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cobra bag, diy, kewlus pro spring, kewlus spring, reflex bag -

Now you can have the ultimate boxing cobra punching bag that is better than any commercial cobra bag on the market at just a fraction of the cost! The key ingredient is the Kewlus Spring.

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cobra bag, diy, reflex bag -

Making your own free-standing reflex punching bag (or cobra bag) is easier than you think. It will also save you hundreds of dollars if you're thinking about getting one.

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