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4" Duct Cap

We make finding a 4" duct cap fast and simple every time!

Shop 4" Duct Cap results

(Showing 1 - 15)

Mfr # GRECP4GA26

Key Features:

  • Duct Fitting Duct Size: 4"
  • Item: End Cap
  • Width: 4 in
original price: $10.07
24% off
new price: $7.59
Mfr # GRAE490GA26

Key Features:

  • Duct Fitting Duct Size: 4"
  • Width: 6 3/4 in
  • For Use With: Greenseam Duct system
original price: $8.59
13% off
new price: $7.39
Mfr # SQ-CAP

Key Features:

  • Item: End Cap
  • Material: Plastic
  • Color: Black
product price: $4.59
Mfr # 4JRP4

Key Features:

  • Item: Sidewall/Ceiling Register
  • Grille/Register Item: Sidewall/Ceiling Register
  • Type: Three-Way
product price: $2.59
Mfr # 4MJT1

Key Features:

  • Item: Filtered Return Air Grille
  • Grille/Register Item: Filtered Return Air Grille
  • Type: Removable Face
product price: $16.99
Mfr # 4JRT5

Key Features:

  • Item: Filtered Return Air Grille
  • Grille/Register Item: Filtered Return Air Grille
  • Type: Removable Face
product price: $21.19
Mfr # 35W634

Key Features:

  • Item: End Cap
  • Type: C-Track
  • Overall Height: Not Applicable
product price: $4.29
Mfr # 4MJD5

Key Features:

  • Grille/Register Item: Toe Space Grille
  • Item: Toe Space Grille
  • Type: Standard
product price: $4.39
Mfr # 45PE74

Key Features:

  • Item: Wall Cap
  • Material: Aluminum
  • Finish: Milled
product price: $45.25
Mfr # 4MJT2

Key Features:

  • Grille/Register Item: Filtered Return Air Grille
  • Item: Filtered Return Air Grille
  • Type: Removable Face
product price: $18.95
Mfr # 4JRT6

Key Features:

  • Item: Filtered Return Air Grille
  • Grille/Register Item: Filtered Return Air Grille
  • Type: Removable Face
product price: $27.49
Mfr # FML 8

Key Features:

  • Item: Wall Cap
  • Cap Height (In.): 9"
  • Cap Width (In.): 5"
product price: $46.77
Mfr # 636

Key Features:

  • Item: Roof Cap
  • Cap Height (In.): 4 3/8 in
  • Cap Width (In.): 6 1/4 in
product price: $21.99
Mfr # 4MJT3

Key Features:

  • Grille/Register Item: Filtered Return Air Grille
  • Item: Filtered Return Air Grille
  • Type: Removable Face
product price: $21.15
Mfr # 641

Key Features:

  • Item: Wall Cap
  • Cap Height (In.): 9"
  • Cap Width (In.): 5-1/2"
product price: $58.00
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