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The Hart & Cooley 8RWT wall thimble provides necessary clearance to combustibles and is designed for use with Type B Gas Vent Systems. The sleeve is adjustable from 3 to 6 inches. Constructed from G-90 steel with a galvanized finish, this adjustable thimble is UL 441 listed.
The Hart & Cooley wall thimble is made from galvanized steel and provides clearance to combustibles when used with Type B Gas Vent Systems.
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