Shop All Savings
Appliances
Bath & Faucets
Blinds & Window Treatment
Building Materials
Lumber & Composites
Cleaning
Decor & Furniture
Lighting & Ceiling Fans
Doors & Windows
Electrical
Flooring & Area Rugs
Hardware
Heating & Cooling
Kitchen & Kitchenware
Lawn & Garden
Outdoor Living & Patio
Paint
Plumbing
Seasonal Decor
Smart Home
Storage & Organization
Tools
Automotive
Furniture
Gift Cards
Credit Cards
View All Home Services
Tool Rental
Benefits & Services For the Pro
Project Calculators
View All DIY Projects
Local Ad
Store Finder
Site Map
#1 Home Improvement Retailer
Select store
...
...
Cart
Select store
...
...
Shop All
Services
DIY
Log In
Cart
...
Home
/
Heating, Venting & Cooling
/
HVAC Supplies
/
Ducting & Venting
/
Register Boxes
Master Flow Register Boxes
Get It Fast
In Stock at Store Today
Free 1-2 Day Delivery
Same-Day Delivery
Filters
Filters
Clear All
Brand: Master Flow
Review Rating: 3 & Up
Price: $10 - $20
Get It Fast
In Stock at Store Today
Free 1-2 Day Delivery
Same-Day Delivery
Availability
Show Out of Stock
Department
Heating, Venting & Cooling
HVAC Supplies
Ducting & Venting
Register Boxes
Price
to
Apply
$10 - $20
$20 - $30
$30 - $40
$40 - $50
$50 - $100
Review Rating
5
4 & Up
3 & Up
2 & Up
1 & Up
Featured Keywords
duct tape
insulated flex duct
sheet metal screw
round pipe
flexible duct
register grille
air register
galvanized steel
5 in. universal register box
30 gauge
galvanized steel construction
6 in. universal register box
right-angle transition
6 in. 90 degree register box
building code
built-in flange
dry wall
register screws
5 in. round pipe
5 in. 90 degree register box
5 in. insulated register box
6 in. end register box
6 in. round pipe
6 in. round
6 in. pipe
8 in. ceiling register box
8 in. universal register box
10 in. x 4 in. air register
10 in. x 6 in. air register
absorb condensation
floor joists
vapor barrier
6 in. ceiling register box
6 in. flexible duct
30 gauge galvanized steel
branch line
joist attachment
register boots
straight transition
View Results
All Filters
Price
Review Rating
Availability
Featured Keywords
Brand: Master Flow
Review Rating: 3 & Up
Price: $10 - $20
Clear All
28 Results
Sort by:
Top Sellers
Top Sellers
Most Popular
Price Low to High
Price High to Low
Top Rated Products
Best Seller
$
11
.
97
(111)
Master Flow
10 in. x 4 in. to 6 in. Universal Register Box
Add to Cart
$
11
.
53
(38)
Master Flow
10 in. x 6 in. to 6 in. Universal Register Box
Add to Cart
$
11
.
74
(114)
Master Flow
10 in. x 4 in. to 6 in. 90-Degree Register Box
Add to Cart
$
14
.
98
(32)
Master Flow
14 in. x 6 in. to 8 in. Universal Register Box
Add to Cart
$
11
.
98
(108)
Master Flow
10 in. x 4 in. to 4 in. Universal Register Box
Add to Cart
$
12
.
85
(71)
Master Flow
12 in. x 4 in. to 6 in. Universal Register Box
Add to Cart
$
13
.
97
(59)
Master Flow
12 in. x 4 in. to 6 in. 90-Degree Register Box
Add to Cart
$
14
.
58
(99)
Master Flow
10 in. x 4 in. to 6 in. End Register Box
Add to Cart
$
18
.
98
(37)
Master Flow
10 in. x 4 in. to 6 in. Register Box with Flange
Add to Cart
$
19
.
51
(38)
Master Flow
12 in. x 6 in. to 6 in. Universal Register Box with Flange
Add to Cart
$
19
.
20
(33)
Master Flow
10 in. x 6 in. to 6 in. Universal Register Box with Flange
Add to Cart
$
17
.
98
(40)
Master Flow
8 in. x 8 in. to 6 in. Ceiling Register Box
Add to Cart