All models has diffirent materials assigned with diffirent colors. This will helps you to understand material structure and easy change any material.
The package consists of:
1) Dentist chair (patient chair) = 71000 polys (the textures for consoles and for TV screes are included)
2) Doctor's chair = 16700 polys
3) Assistant's chair = 13800 polys
4) Tools box = 3200 polys
5) Xray = 3900 polys
6) Work table = 1400 polys