Some places sell it only by the 3 ft/one meter length other places will sell you a shorter length.

When I did mine I found out that there was big craters eaten out of the aluminum on the side that seals against the hose.

I brushed, scraped or ground out all of the white corrosion; degreased with Brake Cleaner and filled it in with the slow curing JB Weld Epoxy and wrapped tape around it so it would contour to the part. Then I filed and sanded down the area. Some air bubbles in the epoxy had to be filled so I did it several times till I was done and it has been that way with no issues since 2008.
At the same time I also had to do that to the Thermostat Housing where the Upper Radiator hose sealed. I don't recall on the bottom radiator hose area.

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84 300D, 82 Volvo 244Gl Diesel