Vapor barrier soft shell for 4 gang 2 inches x 3 inches single device boxes up to 3 inches deep. VB-4 VAPOUR BARRIER 4G BOX
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Brochure
https://static.graybarcanada.com/Generic/id-bro-v1-vapour-barriers.pdf
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Spec Sheet
https://static.graybarcanada.com/Products/Rough-In Products/Rough In, Boxes, Covers/BOXVB4/Files/BOXVB4_Files.pdf
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Spec Sheet
https://static.graybarcanada.com/Products/Rough-In%20Products/Rough%20In%2C%20Boxes%2C%20Covers/BOXVB4/Files/BOXVB4_Files.pdf