This exhaust extension allows for safe venting of exhaust fumes from an unoccupied enclosed area – this will allow your expensive unit to stay dry and secure while maintaining portability. This adapter is designed for use on stock muffler ports that are less than 15/16 inch (24 mm) diameter, weld bead diameter under 1 inch (25-1/2 mm) and length of less than 1 inch (25-1/2 mm) long. See pictures for further explanation. All dimensions are with the spark arrester removed. The spark arrester will have to be permanently removed/relocated for this modification. The buyer will receive: a universal (see spec requirements below) custom low profile exhaust stub, a custom stub to hose adapter, the specified length of 500 degree F rated 1-1/2” I.D. indoor/outdoor flexible duct hose, and the proper size stainless hose clamp.