The inside diameter of the hoses must be adequate to keep pressure loss to a minimum and avoid damage to the hose arising as a result of heat generation or excessive turbulence. Hoses outside diameter can be a critical factor when hoses roufing clamps are used or hoses are routed through bulkhead, check individual hose specification table for O.D.'S.Both fluid and ambient temperature must be considered while selecting a replacement assembly. The hoses selected must be capable to withstand minimum and maximum temperature of system. While selecting a hoses for its maximum temperature care should taken that temperature stated is not an intermittent value.Most often only a duplicate of the original hose will have to be made. Make sure all the requirements of the application are fulfilled. While selecting hoses, its application should be considered i. e. Static Moving Flexing. Various application may require different hoses constructions. For construction please check individual hose specifications.