The Master Flow 10 in. x 4 in. x 6 in. Register Box with Flange is designed for 6 in. round ducts. This 30-Gauge register box with flange is made of zinc-coated galvanized steel. The maximum temperature rating is up to 390 degree F and the minimum temperature rating is as low as 100 degree F.
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- Designed for 6 in. ducts
- 30-Gauge
- Features a minimum temperature rating of 100 degree F and a maximum temperature rating of 390 degree F



















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