Diffusers and Fittings

RectorSeal® AirTec Round Ceiling Diffuser, 55 - 350 cfm, 8 Inch H x 8 Inch W Duct, Polymer, 9-1/4 Inch Ceiling Mount

Hart & Cooley 3800 Adjustable Round Butterfly Damper with Removable Handle, 10 Inch, Steel, 1/4 Inch T, 1-31/32 Inch D

Hart & Cooley 128 Round Butterfly Damper, 8 Inch, For Use with No 16 Diffuser, Cold Rolled Steel, 9-1/2 Inch dia