2 (different) sections of "dragon's teeth" (German: Drachenzähne) anti-tank fortification, each 50mm wide by 100mm deep (2"x 3.9"). These are designed to be compatible with Flames of War rules: use two of them in a line to make a standard fortification section of 200x50mm, or one in front of the other to make an historically correct and accurately scaled 1/100 ("15mm" wargame scale") model.
These multiple lines of square-pyramidal reinforced concrete obstacles were designed to impede the movement of tanks and mechanised infantry, they were employed extensively in WWII, particularly on the Siegfried Line, of which our model is a faithful reproduction.
Supplied unpainted.