Silver Sport 2 Wheelchair : https://shop.drivemedical.com/us/en/products/mobility/wheelchairs/standard-wheelchairs/silver-sport-2-wheelchair/p/969-1 

Full 8k PBR material
8192 x 8192 px

Diffuse_Base Color
Refl. Color
Reflect. gloss
Normal
IOR
Displacement

The archive contains:
Max 2018 (Vray - Corona)
O.B.J.


All objects and materials are logically named

Material made with Substance Painter

Preview Renders: Corona

Those who work in a V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - whichever is preferable for you.
For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.