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The Hart & Cooley 7RWT wall thimble, with a 7 in diameter and 3-1/4 in length, is made of galvanized steel with a thickness of 0.018 in. It provides necessary clearance to combustibles. The sleeve is adjustable from 3 to 6 inches and has an 8-1/16 in ID. Designed for use in Type B gas vent systems.
The Hart & Cooley wall thimble provides clearance to combustibles with an adjustable sleeve.
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