Summary 3D Google Cardboard kit is optimized in 3D printing. He is very ways unencumbered and easy to manufacture and assemble. 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. Print Settings Rafts: NoSupports: NoInfill: 0,15 Notes: The time print all details about 5 hours.