From the Dragon Press Release:
1/72 Sd. Kfz.251 Ausf. C mit Wurfrahmen 40

Main Features:
- 32cm incrediary projectiles (x6)
- Three mounting plates accurately reproduced in different pattern
- Slide-molded rocket crates
- New-tooled detailed launcher frames
- Photo-etched parts
- DS one-piece tracks
- High quality Cartograf decals

About the Sd. Kfz.251 Ausf. C mit Wurfrahmen 40:

The Wurfrahmen 40 was a German World War II artillery unit. It combined the SdKfz 251 halftrack with rocket artillery to form a more mobile, hardened artillery piece than the Nebelwerfer. The weapon consisted of several frames attached to the SdKfz 251 holding 300 mm explosive rockets. 280 mm explosive and 320 mm incendiary rockets were also used.