Selkirk 6 in. D Stainless Steel Round Top Dome 4-40-406-01 The DeNova Detect DD623NCV is

The DeNova Detect DD623NCV is the first and only 10-year battery powered 2-in-1 Natural Gas + Carbon Monoxide alarm - no outlet and no wiring required

It features a Tru-Zero end hook for professional-grade accuracy and a durable blade coating for extended life

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Interior Diameter: 1-29/32 in

Selkirk 6 in. D Stainless Steel Round Top Dome 4-40-406-01 The DeNova Detect DD623NCV isPart of the chimney system roof assembly, the round top is designed with a dome to exclude rain and leaves and a lower skirt to deflect wind for proper chimney draft. In the Type HT chimney (5 inch, 6 inch, 7 inch and 8 inch sizes), the round top is designed with three legs that slide down over the outside of the chimney. A cinch band is then positioned over the legs and tightened to hold the top firmly in place. This design makes cap removal for