Product pictures
The tree grate is made of solid cast-iron. Both the tree grate and the innerside of the tree grate are square of shape. The tree grate consists out of 4 segments. The grate is standard black waxed. This layer is going to oxidate within some months, therefore the colour is getting darker. 
Deviating sizes
TypeOuter sizeInside dimension
Aare 1201200500
Aare 1501500600
Aare 1801800700
Aare 20020001000
cast iron (black waxed)