The outer diameter of the applicable cable of JR13WCCA-9(72) is 9 mm ± 0.5 mm as specified in the specifications.
The difference between JR13WCCA-9(72) and JR13WCCA-9(31) that is listed on the catalog is material of waterproof packing.
JR13WCCA-9(31) : NBR (Nitrile rubber)
JR13WCCA-9(72) : SIR (Silicone rubber)