The Tank, Cruiser, Challenger (A30) was a British tank of World War 2. It mounted the 17 Pounder gun on the Cromwell chassis to add heavier anti-tank firepower to the cruiser tank units.
This is the Flames of War blister of the British Challenger A30 Tank.
Within the blister, as with a lot of FoW models, you get a resin hull and turret and metal tracks and accessories.
See the full workbench feature on my Challenger A30.