This is the Trumpeter 00363 kit in 1/35 scale, of the ‘German Pz.Kpfw.IV Ausf. F Fahrgestell’.
A total of 13 Munitionsschlepper were produced on Pz.Kpfw.IV Ausf. D, E, and F chassis which had been acquired from the normal Pz.Kpfw.IV production run as reported in May 1941.
There were two Munitionsschlepper for each of the six Gerät 040 Nr. I to VI and one for the experimental Gerät Nr. VII.
Source: Trumpeter website