This is a very special product, in which the connection fitting is not pressed onto the finished hose but is incorporated into the structure during its construction. The fitting is therefore vulcanized together with the rubbers and the reinforcements of the hose in order to obtain a single body, in which the main benefits are the elimination of any possible leaks, to avoid the fittings pull-off, to allow the flow of the product without turbulence end the elimination of food deposits which might allows the developments of microbes / germs. Three basic families are recognized: standard vulcanized fitting (AGRA-MD /15), vulcanized and coated fitting (AGRA-SHIELD /20), fitting with rubber beads (only type with connection flanges (AGRA-SH SD/20))