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Steel Square to Round Adapter for Model SH Series Louvered Face Diffuser
The square to round adapter for diffusers, grilles, and registers allows the attachment of round duct to most square neck grilles, registers, and diffusers.
  • Square to Round for SH Series Diffusers
  • Square Sizes are 18"x18" and 21"x21"
  • Steel Construction
  • Standard Finish is British White