Can the petWALK pet door be installed in masonry or lightweight construction walls?

PetWALK pet doors support the wall mounting with a wall thickness from 5cm to 75cm with an airtight tunnel. The tunnel elements can be ordered in a 10 cm grid as accessories. An accurate cutting of the tunnel elements is easily done by using normal DIY tools. The petWALK pet door is built in a way that you do not have to drill holes and dowels, because it is bolted to itself and spans the enclosing wall.