Coupling Size Side A 4.0 Inch (100mm) Coupling Style Side A Rocker Coupling Swiveling/Rigid Side A Swivel (full time, even after tightening) Connection Type Side A NH Female Coupling Size Side B 3.0 inch (76mm) Coupling Style Side B Rocker Coupling Swiveling/Rigid Side B Swivel (full time, even after tightening) Connection Type Side B NH Female