Since there is no industry standard for hose wall thickness, the ID of the hose cannot be used to determine the correct ferrule.To determine the proper size ferrule, measure the OD of the hose (as a decimal) and go up to the next larger size Ferrule ID listed above.Example: If the hose OD is .555 "use a #7325 Ferrule, which has an ID of .562".See page 19 for listing and descriptions of all Western hand crimp tools and model 5111-A bench tool.
** Use of hand tool is not recommended. Model 5111-A is a heavy-duty bench style ferrule machine.