Comparison : Item # 11490, 1/8 Inch (in) Nominal Inside Diameter (ID) No Stop Coupling
Item # 11491, 1/4 Inch (in) Nominal Inside Diameter (ID) No Stop Coupling
Item # 11492, 3/8 Inch (in) Nominal Inside Diameter (ID) No Stop Coupling
Item # 11493, 1/2 Inch (in) Nominal Inside Diameter (ID) No Stop Coupling
Item # 11494, 5/8 Inch (in) Nominal Inside Diameter (ID) No Stop Coupling