Diffuser: Ceiling/Wall, 9 in H, 9 in W, Surface Mount, 6 in Duct, Aluminum, 4-Way Louvered, White Model: 4MJJ5

American Louver Diffuser: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, 14 in Duct, Plastic, Square Plaque, Black Model: STR-PQ-14BK

American Louver Diffusers: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, Plastic, Perforated, White [PK/20] Model: STR-PERF-2238-20PK

F-Matic Versa Aluminum Diffuser HVAC System Black 110V W/HVAC

American Louver Diffusers: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, Plastic, Perforated, White [PK/5] Model: STR-PERF-2212-5PK

F-Matic Versa Aluminum Diffuser HVAC System Silver 110V W/HVAC

Rectorseal Acid Away 45009 Acid Buildup Remover, Easy Application, HVAC, 4 Oz.

Airtec By Truaire GR360S

American Louver Company STR-C-W-NRD Stratus Universal Cone Diffuser Reducer Kit 6" To 14"

Diffuser: Ceiling/Wall, 11 in H, 11 in W, Surface Mount, 8 in Duct, Aluminum, 4-Way Louvered, White Model: 4MJJ6

American Louver Diffuser: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, 8 in Duct, Plastic, Square Cone, Black Model: STR-C-8BK

Airtec MV4S 4-Way White Ceiling Diffuser

American Louver Ceiling Diffuser: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, 10 in Duct, Plastic, Square Plaque Model: STR-PQ-10W-FR

American Louver Diffuser: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, 6 To 14 in Duct, Plastic, Square Plaque, Black Model: STR-PQ-BK-NRD

American Louver Diffuser: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, 6 To 14 in Duct, Plastic, Square Plaque, White Model: STR-PQ-W-NRD

Titus Ceiling Diffuser: Ceiling Diffuser, TMS-3-8-24X24 Model: TMS-3-8-24X24

Havaco Technologies HT-2CCGRB-S1D

American Louver Diffuser: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, 8 in Duct, Plastic, Square Plaque, White Model: STR-PQ-8W-R6

American Louver Diffusers: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, Plastic, Perforated, White [PK/5] Model: STR-PERF-2214-5PK

BUILDMART - 24" Mud-In Linear Slot Diffuser - 2 Slot - Air Vent Cover - Drywall MUD IN White Air Vent - MUD Linear Slot Diffuser - Register Grille For Ceiling And Walls - Texas Buildmart

Diffuser: Ceiling/Wall, 13 in H, 13 in W, Surface Mount, 10 in Duct, Aluminum, 4-Way Louvered, White Model: 4MJJ7

Diffuser: Ceiling, 23 3/4 in H, 23 3/4 in W, Lay-In, 12 in Duct, Steel, Square Cone, White Model: 4MJU5

Diffuser: Ceiling/Wall, 13 in H, 13 in W, Surface Mount, 10 in Duct, Aluminum, 3-Way Louvered, White Model: 4MJJ4

American Louver Company Stratus Black Cone Diffuser With 14" Neck STR-C-14BK

12.5" Round White Plastic Standard Air Grille Air Diffuser Bu Airtec Rectorseal