Comparison : Item # E 100CI, 1 Inch (in) Size Plated Iron Type E Male Adapter x Shank Cam and Groove Coupling
Item # E 150CI, 1 1/2 Inch (in) Size Plated Iron Type E Male Adapter x Shank Cam and Groove Coupling
Item # E 200CI, 2 Inch (in) Size Plated Iron Type E Male Adapter x Shank Cam and Groove Coupling
Item # E 300CI, 3 Inch (in) Size Plated Iron Type E Male Adapter x Shank Cam and Groove Coupling
Item # E 400CI, 4 Inch (in) Size Plated Iron Type E Male Adapter x Shank Cam and Groove Coupling