The spigot with the mesh serves as the end of ventilation ducts leaking. Perforated mesh made of galvanized sheet allows blowing or extracting air constituting a simple kind of ventilation grille.
Attention!
The spigot with mesh for fittings type KS-F has a sleeve construction. It is intended for mounting in ventilation fittings. For mounting in spiro pipes, the KS-R connector is made in a nipple.