View on LOZ Suggested Retail: $160.36. . Copperfield 69631 6 Inch Dura-Vent Dura/Plus Wall Thimble, Galvanized Steel Painted Black,with Trim. Measures 6 inches to ensure that it can adjust from a minimum of 4.25-inch to a maximum of 7.25-inch wall thickness to fit between standard wall studs. With thicker walls, connect the telescoping pieces together and it can extend up to 16-inches with a field-fabricated extension. Made for DuraPlus chimney pipe and extends a minimum of 2 inches into the room. Made of galvanized steel and painted black, this wall thimble trim will blend neatly with your chimney pipe. Designed with an easy in-and-out fit to ensure that you'll have your set-up put together as quickly as possible. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.