One common problem with traditional couplings can be flow restriction and build-up of material around the area of the coupling shank. To allow a full-flow through a hose assembly, we offer Internal Expansion. Our warehouse is equipped with a high-power machine capable of pressing the coupling from the INSIDE out, trapping the hose between hose stem and ferrule! In addition this assembly can handle higher working pressures AND a longer service life. And yes, we stock these too.