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  • Deflect-O 4 in. D Silver Aluminum Increaser/Reducer
  • Deflect-O 4 in. D Silver Aluminum Increaser/Reducer
  • Deflect-O 4 in. D Silver Aluminum Increaser/Reducer
  • Deflect-O 4 in. D Silver Aluminum Increaser/Reducer
  • Deflect-O 4 in. D Silver Aluminum Increaser/Reducer

Deflect-O 4 in. D Silver Aluminum Increaser/Reducer

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This aluminum Duct Increaser/Reducer is an adaptor that allows you to connect 3 in. duct to 4 in. duct.