Conical collar made of AISI 304 stainless steel, diameter 150 mm, thickness 0.5 mm. A protective element for the point where the flue pipe passes through the roof or roof covering, designed to provide waterproofing, facilitate water drainage and seal the gap between the flue pipe and the structure. Compatible with the Alfonso 4 and 10-pizza wood-fired and hybrid ovens from the Professional range. ISO 9001:2015 certified, CE compliant. Made in Italy.