It's not impossible to make such a pulley on a home machine, but the thin parts are at a higher risk of failure. High strength nylon may be a good choice, even perhaps a quality PETG filament would hold up, considering the low forces involved in the use of the pulley. I'd probably try PETG first at 0.100 (100 micron) layer height. Perhaps use PLA at 200 micron layers for initial construction to confirm correct sizing, then switch to PETG for the final print.