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Nominal Penetrant Size

1" - 2" (1)
1-1/4" - 3" (1)
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2-1/2" - 4" (1)
4" - 6" (1)

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$5 to $10 (3)
$10 to $15 (2)

Extension Sleeves

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Product Image of 1/4"-1-1/4" Extension Sleeve for #1 Firestop Sleeve & #2 Hollow Sleeve
$5.07 each
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Product Image of 1"-2" Extension Sleeve for #2 Firestop Sleeve and #3 Hollow Sleeve
$5.88 each
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Product Image of  1-1/4"-3" Firestop Sleeve Extension w/ Cap for HFP-M3B, HFP-P3B & HFP-H4B
$6.54 each
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Product Image of 2-1/2"-4" Firestop Sleeve Extension w/ Cap for HFP-M4B, HFP-P4B & HFP-H5B
$10.04 each
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Product Image of 4"-6" Extension Sleeve for #6 Firestop Sleeve & #7 Hollow Sleeve
4"-6" Extension Sleeve for #6 Firestop Sleeve & #7 Hollow Sleeve
SKU: HFPE6
Holdrite
SKU: HFPE6
Brand: Holdrite
$11.75 each
BOX UP & SAVE 7%
$21.92 box of 2
$10.96 each
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More About Extension Sleeves
This category contains extension sleeves that extend the height of firestop and hollow sleeves by as much as 43/4 in 1/4” increments.
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