Engine and automatic transmission are located in the left rear corner of the bus.

Body of the vehicle is welded from steel-voltage profiles, flashings from the outside and interior are lined with plastic sheeting.

In 2006 SOR introduced in Brno on Autotec a completely new range of low-floor buses.

Rigid single-decker bus NB 12 and articulated single-decker bus NB 18 were presented with their prototype after the prototypes hav done both test drive through cities in Czechia and Slovakia.

The second bus type NB 18 was introduced at Autotec 2008 and from first prototype it differs with modified design.