Firemaster Anti-bird spiral

Also called crow cap. The Anti-bird spiral is a metal grille cap made of spring steel that is attached to the outlet of the chimney pipe to prevent bird nests in the chimney. On the top is a protruding steel pin that prevents birds from relieving themselves in the ventilation duct of your bathroom, toilet or kitchen. Where it is wonderful to stay on the heat of your ventilation ducts for jackdaws and other birds on traditional ball wire grilles, that is definitely no longer possible with this invention from Firemaster: 'the anti-bird spiral'.