The vehicles are 15mm and are completely compatible with Flames of War and Forged In Battle. Denis provided me with 2 very large German tanks in the E-50 and E-75 category.
Each tank comes in a nice cardboard box with foam. The tanks are a mixture of resin and metal. The Guns and a little antenna are metal. All other items (tracks, turret and hull) are resin.
The E-50 comes with a single barrel, while the E-75 came with 2.
I found that everything fits together nicely and I didn't have to file anything. I suppose if I was a perfectionist, I might try a little filing, but I thought everything looked good as is. The resin retains plenty of detail. I would rate Clockwork Goblins resin as the best standard I have seen. Heer46's resin is not as good as theirs IMO, but it looks good just the same.
The guns have square inserts and fit nicely when placed into the hulls. The Tracks had 3 tabs that fit to the hull and were super easy to attach. I like to use green stuff to hold the parts in place while the glue has time to dry.
The guns are huge on these beasts as you should be able to see in the pictures below.
Each Turret comes with a pretty long peg, but the E-75's turret + the gun make it a little top heavy, so you have a few options. Get a really strong magnet set (this will require you to cut the peg), Glue the turret down or try to rig something underneath the turret to hold it in place with the peg still attached. Another option is to chop the peg and add a new on that is longer, You will still need to attach something to the end of the peg to keep the turret from coming off.
Heer46 Tank Packaging
Heer46 Tank Brochure
US Sherman, German tiger, E-75, Panther, E-50
Clockwork Goblin Miniatures Tank, German E-75
German FOW Tiger, E-75
German CGM, Heer46 E-75, USA CMG
German E-50, Panther