The Precision I (HF905)I (HF907)I (HF910) Flue Collar connects the flue outlet of your Hi-Flame Precision 3 to the flue pipe, sealing the junction against heat and combustion gases. This genuine spare part is made in cast iron to the original specification for the Precision 3. A properly sealed flue collar is essential for safe stove operation and correct draught. Fitting is straightforward.