Coolant pipe to radiator feed hose which most people use for all applications (although VW offered a different hose for 205 or larger spare tires which is now obsolete in rubber). Additionally please note that if you have 84 or 85 with the long metal pipes (1.25" O.D.) as opposed to plastic pipes (1.5" O.D.) then you must use the hose adapter with this hose to fit correctly.
Please keep in mind that we have a silicone version of this hose as an alternative should this hose be out of stock or if you prefer the upgraded material.