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Currently using Full Metal Jacket (Metal Back Plate) that slides on my to the XTRUCASE DUO Series case... I can take this off anytime and transform my case back to an aluminum bumper (lay on table design)

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I have a stingray skin back from Valentine Goods:

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Recently I paired it with a black bumper from Apple after I dropped the phone and scraped the stainless steel band.
 
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