4"x3" Pipe Coupling w/2 Clamps

This 4" x 3" Coupling can be used in any roof drain system. It transitions between two different size pipes.  It provides exceptional flexibility to reduce the damaging effects of roof expansion and contraction. Preserves downspout / drain integrity to prolong roof life and decrease possibility of leaks and call backs. Constructed of thermoplastic rubber with two stainless steel bands. Made in U.S.A.