Leaked Nubia Z17 renders show that the phone has dual cameras on the back and that it comes in two different colors, which are Blue and Gold according to the leaked images. That said this doesn't mean there won't be any more colors of this device, but it's entirely possible that these are the chosen color options and that Nubia may decide to stick with just two. These new leaks may be the first leaked renders which show both colors as an option, but it isn't the first set of leaks which detail the possibility of the Nubia Z17 having dual rear-facing cameras.
The Nubia Z17 actually leaked earlier this morning showing the same feature. The difference between the earlier leak and this one is that the dual rear-facing camera module is vertical in the leak from earlier this morning and it's located in the middle of the device just above the fingerprint sensor that is also placed on the back. The Nuba Z17 in this render is also a grey color, which suggests that there may be a third possible color variation of the device.
It's worth noting that these new renders show the dual rear-facing cameras placed on the back horizontally and they're located in the top left corner of the device. The Nubia branding is also located just under the fingerprint sensor instead of at the bottom edge, so there are a few things that don't match up between the two leaks. Considering this either leak could be the Nubia Z17, so it likely won't be known which design Nubia is deciding on until it gets closer to a launch or until Nubia actually announces the device. One interesting thing of note here is that while the gold model device has a gold back and gold frame, the blue model has gold trim around the camera module and a gold frame as well as gold branding. The device specs, just like the device itself, haven't been confirmed just yet but it's rumored that the Z17 will possibly have 8GB of RAM which would be double what most flagship devices currently have.