The high temperature 2-PLY reinforced silicone 40 degree reducer coupler is designed to connect to a (4" x 3-1/2") OD tube and is 3" long. The coupling is 3" long with a 40 degree bend. Standard stainless steel worm-gear #056 and #064 clamps provides tight connections, durability and is corrosion resistance for industrial, commercial, truck, off-road and racing applications.