Comparison : Item # HFFP-3, 3/8 Inch (in) Size High Flow Plug
Item # HFFP-1, 1/4 Inch (in) Size High Flow Plug
Item # HFMP-3, 3/8 Inch (in) Size High Flow Plug
Item # HFMP-1, 1/4 Inch (in) Size High Flow Plug