DetailsChoose Wood-Furnaces.net when you need replacement wood furnace parts, such as this Replacement Draft Cap. The part number is 40379. Fits Units: 4.5, 1400, 1500, 1600, 1602, 1537G, 1537M, 1557M, 1600G, 1600M, 1602M, and 1802G. The cap measure 3 1/2 inches in diameter and has 5/16 threads.
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