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  2. Air Distribution - Supply and Return Diffusers, Registers and Grilles
  3. Supply Diffusers, Registers & Grilles
  4. Model 520D-Double Deflection Louvered Supply Grilles with a Damper
  5. 18" x 6"- Model 520D-Double Deflection Louvered Supply Grilles with a Damper

#4560 18" x 6"- Model 520D-Double Deflection Louvered Supply Grilles with a Damper

Face Size (in) 20 x 8
Inlet Size (in) 18 x 6
Mounting Type Surface Frame