Xpelair SSWKBS Simply Silent Square Contour Wall Kit - Brown/White Box Contains1 x External grille1 x 300mm wall tube1 x installation instructions

_Folding external ventilation grille with so simple installation from inside the building.
_Steel spring clips secure the external grille into place.
_So simple installation, no need for Ladders, scaffolding or outside installation in all weathers
_Supplied with a high Quality 300mm length of 4 inch diameter wall tube.
_Suitable for installation with 4" Diameter extractor fans.