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Exclusive 1-piece construction insures a positive leakproof installation every time. Elastometric collar allows the vent stack plenty of room for expansion and contraction. Aluminum base is made from prime .032 metal, a lightweight long-lasting flashing. Easy-to-install, the flashing slips over the vent stack and automatically adjusts to pipe size and roof angle. Remains perfectly flat on roof. No. 12923-NC1: 1-1/4" to 1-1/2", base size: 12" x 9"
No. 12936-NC2: 2", base size: 12" x 9"
No. 12949-NC3: 3", base size: 12" x 9"
No. 12958-NC4: 4", base size: 12" x 9"
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