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
5 rings 69 × 69 × 7.5 cm.
Diameter of ceiling mount 23 cm.
7 rings 81 × 80 × 7.5 cm.
Diameter of ceiling mount 30 cm.
Link to the site https: //www.lampatron.ru/cat/item/design-lamps-twine/