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Adjustable Elbow (2)
Air Vent (4)
Boot (2)
Cap (3)
Collar (38)
Damper (6)
Drive Cleat (1)
Duct Cap (3)
Duct Wrap (2)
Elbow (10)

Price Range

$1 to $5 (2)
$5 to $10 (41)
$10 to $15 (40)
$15 to $20 (45)
$20 to $25 (15)
$25 to $30 (20)
$30 to $35 (5)
$35 to $40 (7)
$40 to $45 (1)
$45 to $50 (3)

GAF Master Flow

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Product Image of 10" x 10" Ductboard R6-Insulated Register Box, DIRB10X10
$24.49 each
In Stock
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Product Image of 6" Adjustable Storm Collar, SMC6
$15.99 each
In Stock
Get 9 by Tue, Jun 9
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Product Image of Bath & Dryer Rooftop Appliance Vent (Grey), BDV4GR
$78.95 each
In Stock
Get 7 by Tomorrow, Jun 5
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Product Image of 20" Master Flow Starting Collar, LSC20
$39.99 each
In Stock
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Product Image of 4" Pivot Pipe Boot Flashing - 26 Gauge (Black), PPBG4BL
$62.95 each
In Stock
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Product Image of 6" x 24" Round Metal Duct Pipe, BCP6X24
$7.99 each
In Stock
Get 14 by Tue, Jun 9
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Product Image of 8" 30 Ga Galvanized Connector Tee, T8X8X8
$22.99 each
In Stock
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Product Image of 9" Master Flow Starting Collar, LSC9
$15.53 each
In Stock
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Product Image of 4" Fresh Air Intake Vent, FAV4
$23.99 each
In Stock
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Product Image of 6" Starting Collar w/ Damper, DSCFD6
$29.99 each
In Stock
Get 35 by Tue, Jun 9
In Stock
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Product Image of 3" Round Duct Cap, DC3
$5.49 each
Out of Stock
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Product Image of 5" Adjustable Storm Collar, SMC5
$14.99 each
In Stock
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Product Image of 12" x 2.25" to 6" Register Box (90-Degree), 90RB12X2.2X6
$11.99 each
In Stock
Get 13 by Tue, Jun 9
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Product Image of 7" Flexible Duct and Sheet Metal Connector Splice Collar, FC7
$17.99 each
In Stock
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Product Image of 4" x 24" Round Metal Duct Pipe, BCP4X24
$6.99 each
In Stock
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Product Image of 18" Flexible Duct Connector, FC18
$27.99 each
In Stock
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Product Image of 3.25" x 10" x 60" Rectangular Duct, RD3.25X10X60
$26.99 each
In Stock
Get 10 by Tue, Jun 9
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Product Image of 3.25" x 14" x 5' Half Section Rectangular Stack Duct, RD3.25X14X60
$29.99 each
In Stock
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Product Image of 3" x 24" Round Metal Duct Pipe, BCP3X24
$5.99 each
In Stock
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In Stock
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Product Image of 4" 30 Ga Galvanized Connector Tee, T4X4X4
$16.99 each
In Stock
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In Stock
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Product Image of 1.5" Pivot Pipe Boot Flashing - 26 Gauge (Black), PPBG1.5BL
$49.95 each
In Stock
Get 2 by Tomorrow, Jun 5
In Stock
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Product Image of 12" x 8" Ductboard R6-Insulated Register Box, DIRB12X8
$25.99 each
In Stock
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In Stock
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Product Image of 3.25" x 10" Rectangular Galvanized Duct Elbow, 90E3.25X10
$13.99 each
In Stock
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Product Image of 8" x 4" to 4" Insulated Register Box, IRB8X4X4
$19.99 each
In Stock
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Product Image of 12" x 6" to 7" Insulated Register Box, IRB12X6X7
$24.99 each
In Stock
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Product Image of Master Flow Replacement Humidistat Control for Power Attic Vents
$46.95 each
In Stock
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Product Image of 14" Damper, D14
$16.99 each
In Stock
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Product Image of 6" Roof Flashing w/ Tapered Stack, RFTS6
$19.54 each
In Stock
Get 30 by Tue, Jun 9
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Product Image of 12" x 4" to 6" End Register Box, ERB12X4X6
$15.99 each
In Stock
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Product Image of 8" x 24" Round Metal Duct Pipe, BCP8X24
$9.99 each
In Stock
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Product Image of 3" Adjustable Storm Collar, SMC3
$12.99 each
In Stock
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Product Image of 7" x 24" Round Metal Duct Pipe, BCP7X24
$8.49 each
In Stock
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Product Image of Bath & Dryer Rooftop Appliance Vent (Brown), BDV4BR
$78.95 each
In Stock
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In Stock
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Product Image of 3.25" x 12" x 3' Half Section Rectangular Stack Duct, RD3.25X12X36
$16.99 each
In Stock
Get 30 by Tue, Jun 9
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Product Image of 4" Adjustable Storm Collar, SMC4
$13.99 each
In Stock
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Product Image of 10" x 3.25" to 5" Stack Boot, SB10X3.25X5
$15.49 each
In Stock
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Product Image of 8" Starting Collar w/ Damper, DSCFD8
$32.99 each
In Stock
Get 6 by Tomorrow, Jun 5
In Stock
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Product Image of 5" x 24" Round Metal Duct Pipe, 26CP5X24
$9.99 each
In Stock
Get 4 by Tomorrow, Jun 5
In Stock
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Product Image of 12" x 6" Ductboard R6-Insulated Register Box, DIRB12X6
$23.99 each
In Stock
Get 24 by Tue, Jun 9
In Stock
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Product Image of 1-3/4" x 100 Yds. Black Woven Vinyl Hanger Strap, HS1.75WV
$23.99 each
In Stock
Get 8 by Tue, Jun 9
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Product Image of 6" x 6" Ductboard R6-Insulated Register Box, DIRB6X6
$22.99 each
In Stock
Get 7 by Tomorrow, Jun 5
In Stock
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Product Image of 7" Starting Collar w/ Damper, DSCFD7
$30.99 each
In Stock
Get 2 by Tue, Jun 9
In Stock
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Product Image of 5" Roof Flashing w/ Tapered Stack, RFTS5
$17.99 each
In Stock
Get 9 by Tue, Jun 9
In Stock
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Product Image of 12" Air-Tite Take-Off w/ Damper, ATTOD12
$35.99 each
In Stock
Get 33 by Tue, Jun 9
In Stock
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Product Image of 5" Starting Collar w/ Damper, DSCFD5
$27.99 each
In Stock
Get 6 by Tomorrow, Jun 5
In Stock
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Product Image of 5" Flexible Duct Connector, FC5-GAF
$15.99 each
In Stock
Get 9 by Tue, Jun 9
In Stock
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Product Image of 3.25" x 10" x 7" Fan Boot, FB3.25X10X7
$16.99 each
In Stock
Get 12 by Tue, Jun 9
In Stock
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Product Image of 2" Pivot Pipe Boot Flashing - 26 Gauge (Black), PPBG2BL
$49.95 each
Out of Stock
Get it by Fri, Jun 19 - Fri, Jun 26
Out of Stock
Get it by Fri, Jun 19 - Fri, Jun 26
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More About GAF Master Flow
More homes and businesses in the U.S. are protected by a GAF roof than by any other product. GAF is the leading roofing manufacturer in North America, with plants strategically located across the U.S. As a Standard Industries company, GAF is part of the largest roofing and waterproofing business in the world.

Diverse, equitable, and inclusive teams are at the heart of leadership at GAF, North America's largest roofing manufacturer. GAF is committed to fostering a culture that reflects their values to connect, empower, evolve, and inspire where they embrace.