Paul is quite right.
Just for info the original belt numbering would be something like this (off my car).......6PK1430
6 indicates the number of ribs on the belt, so mine is a 6-rib belt.
PK – The “P” indicates a metric designation and “K” indicates the belt is automotive (per SAE J1459).
1340 - is the effective length of the belt in millimeters.