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![](https://beteccad.com/wp-content/uploads/2021/04/b30-and-b20-gb-and-gsb-c1-450x450.jpg)
MSD-GB-20C1-A-R
Galvanized construction, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b20-and-b30-gb-and-gsb-c2-450x450.jpg)
MSD-GB-20C2-A-R
Galvanized construction, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b30-and-b20-gb-and-gsb-c1-1-450x450.jpg)
MSD-GSB-20C1-A-R
Galvanized construction, Class 1 leakage at 250° F, 3V stainless steel single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b20-and-b30-gb-and-gsb-c2-1-450x450.jpg)
MSD-GSB-20C2-A/R
Galvanized construction, Class 2 leakage at 250° F, 3V stainless steel single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b20-gbd-c2-450x450.jpg)
MSD-GBD-20C2-A-R
Galvanized construction, Class 2 leakage at 250° F, Aerofoil blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/all-b21-except-c3-450x450.jpg)
MSD-GB-21C1-A-R
Galvanized construction, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/all-b21-except-c3-4-450x450.jpg)
MSD-GB-21C1-A-R
Galvanized construction, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/all-b21-except-c3-2-scaled-450x450.jpg)
MSD-GB-21C2-A-R
Galvanized construction, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/all-b21-except-c3-3-450x450.jpg)
MSD-GB-21C2-A-R
Galvanized construction, Class 2 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/b21-gb-c3-450x450.jpg)
MSD-GB-21C3-A-R
Galvanized construction, Class 3 leakage at 350° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b21-gb-c3-450x450.jpg)
MSD-GB-21C3-A-R
Galvanized construction, Class 3 leakage at 350° F, 3V single skin blade, 4 in. wg, 2000 fpm, operating temperature 250° C up to 2 hours
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![](https://beteccad.com/wp-content/uploads/2021/04/b30-and-b20-gb-and-gsb-c1-2-450x450.jpg)
MSD-GB-30C1-A-R
Galvanized construction, Class 1 leakage at 250° F, 3V single skin blade, 4 in. wg, 2000 fpm
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![](https://beteccad.com/wp-content/uploads/2021/04/b30-and-b20-gb-and-gsb-c1-3-450x450.jpg)
MSD-SB-30C1-A-R
Stainless steel construction, Class 1 leakage at 250° F, 3V stainless steel single skin blade, 4 in. wg, 2000 fpm
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