The titanium Iphone 6 exterior cover is designed by Gresso,which possess strongest hardness and with good cursh resistance.Besides,the design and touch feeling give us impression of "High grade,High end and classy".But the price is really also impressed,it's quoted upto USD2000,wage earner cann't affort it.Gresso will subsequently design a new type of shell made by 18k gold and platinum,which is by far the most classy and price will upto USD3000.

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