The Rainman petrol (gasoline) pressure supply units use a belt drive system with a drive belt that will last for many years. Some customers will choose to buy a spare and keep it handy if the original belt wears. Older systems earlier than mid-2016 used a gray color single sided belt, but systems since that time utilize a maple color double sided belt. Please specify which is required.
The electric pressure supply units do not use the belt as the pumps are mounted direct on the motor shaft.