Thin plastic pipe with rubber connectors either end.
This replaces the old metal type which also had a vacuum chamber built into the line, that was made obsolete.
This hose is 26" (660mm) long & has 2 rubber ends, one straight & one at a right angle.
Recommend: 1 x 37H4229M per Mini.
For the angled rubber connector, see 12B2062
For the straight rubber connector pipe, see 12B2095