Please remember the following details:

Preview: 1

Materials: Black Metal /Glass

Created in 3ds Max 2017

Unwrapped: Yes

Export: Obj / FBX / Stl

Render engines: V-Ray and Corona

Clean topology and proper naming

Preview rendered in V-Ray.

No hidden objects.

No plugins used.

All objects have materials.

No missing textures and cleared texture paths.

Lights, camera, and scene setup NOT included

All objects have a 1:1 scale.

Number of Sockets: 2

For more details and a smoother model, you can use the TurboSmooth modifier on this model.