PHOTOS: 7 things you need to know about NFL footballs

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Thanks to deflate-gate, everybody knows a regulation NFL football should be inflated to 12.5 to 13.5 psi. Well, here are 7 other things you need to know about balls!
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sportsSuper BowlSuper Bowl 50nflNew England PatriotsSeattle Seahawkssports equipmentdistractionSan Francisco 49ersu.s. & world
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