The archive includes:
Bracket for loft shelf KSR-300
LxHxW: 300x300x50
https://tavr-24.ru/p425809760-kronshtejn-dlya-polki.html
Reinforced bracket Console 300
LxHxW: 300x300x50
https://tavr-24.ru/p425809797-kronshtejn-usilennyj-konsol.html
For Corona render it is recommended to install at least version 1.5 since the glossiness of the materials is adjusted with PBR in mind.