This is the home button/w Touch ID sensor the 12.9" iPad Pro models. This product is used only on the space grey model of the 12.9" iPad Pro model. There is no functional difference between this product and either of the gold or silver variants it is purely cosmetic.
Please note that these home buttons are linked directly to the logic board of the device and therefore replacing the button by itself will cause the device to loose the ability of the touch ID function.
Condition : Recycled
This is a used part from a recycled computer. In the case of a functional part, it has been fully tested prior to putting in stock and is guaranteed to be fully functional.
Warranty : 3months