Made in Kevlar for longer life. This is the regular length 50mm long bypass hose used on all minis from 1959 except 1275cc inc Cooper S (
AEG484) until the factory introduced the longer head by pass tube (
12A2075) and shorter hose (GZA2086)to enable changing the hose without removing the cylinder head.
GZA2086 was 42.5mm so you will have to shorten this hose by up to nearly 10mm to fit the later type bypass tubes. See also
C-GZA2083 silicon hose which slides on easier and gives much longer life.