The model was created in the 2014 version and saved in the earlier 2011.
There is also an OBJ format.
There are no third-party plugins, all elements are named after their own names.
For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured taking into account PBR,
Dimensions; _Length x Width x Height
3 rings 44 × 39 × 6 cm.
Diameter of ceiling mount 18 cm.
4 rings 56.5 × 53.5 × 7.5 cm.
Diameter of ceiling mount 30 cm.
Link to the site https: //www.lampatron.ru/cat/item/design-lamps-twine/