Used to ensure clearance to combustibles is maintained. Also serves as a firestop. Adjusts from 4-1/8" to 7" to fit thickness of wall. Type B gas vent. Wall Thickness: 4-1/8 In. - 7 In. \nSize: 3 In. \nA Size: 3-5/8 In. \nB Size: 7 In.
Used to ensure clearance to combustibles is maintained. Also serves as a firestop. Adjusts from 4-1/8" to 7" to fit thickness of wall. Type B gas vent. Wall Thickness: 4-1/8 In. - 7 In. \nSize: 3 In. \nA Size: 3-5/8 In. \nB Size: 7 In.
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