The Space Marine Razorback boxed set contains one (1) plastic Space Marine Razorback tank. All models are supplied unassembled and unpainted.
The addition of a turret-mounted weapon system to a Rhino creates the infantry combat vehicle called a razorback. Many Chapters swear by their use, attesting that the extra firepower provided by the Razorback more than makes up for the reduced transport capacity.
A Razorback Transport may be included in your Space Marines army as a transport for Space Marine Troops.