The set contains the VENTS ventilation system together with the unit here is the link http://vents.ua/cat/air-handling-units-heat-recovery/  Fire hydrant system and a smoke detector. Suspended cable suspension system 3 types Plus the bonus is a lamp for the office Pendant Lights lamp LED here is the link https://www.aliexpress.com/item/Upscale-chandelier-lighting-aluminum-straightedge-office-Pendant-Lights-lamp-  LED-light-120cm-light-white / 2049689909.html? Spm = 2114.10010208.1000016.1.dD5acK & isOrigTitle = true Information on the scene of the files Max 2015 and 2014 plus obj all the textures are in the same folder there are 3 customized colors but if desired you can assign Through a diffusion any color. The shader simulates painted slightly rubbed aluminum. PS Have a good work for you