3D Google Cardboard kit is optimized in 3D printing. He is very ways unencumbered and easy to manufacture and assemble.
https://www.youtube.com/watch?t=1&v=uzJ-a_K3tdc
We updated the previous Google Cardboard kit.
The back panel is changed.
Additional parts are added.
Don't worry that your phone will drop out.
Collect a kit and use with pleasure.
Lenses diameter 25mm, focus of 45 mm.
Use a little glue.

No

No

0,15

The time print all details about 5 hours.