STOP LOOKING FOR A 4" CONNECTOR. THIS ONE ACTUALLY FITS A WOODSTOCK 4" HOSE & GENERIC 2 1/2" HOSE. I HAVE SPENT $$ ORDERING 4" CONNECTORS ONLY TO BE DISAPPOINTED THAT THEY DON'T FIT LIKE YOU WOULD EXPECT IT TO. WILL NOT FIT 4" MACHINE OUTPUT CONNECTIONS, BUT FITS THE HOSE LIKE IT'S SUPPOSED TO. HIGHLY RECOMMENDED.