#1705-0000R fits PSI/RCD mini blower snouts that use the six .312" bolt six .312" ring dowel pin pattern. Pulley is 3.750" wide with a 1.00" bore to work with 75 and 84mm wide blower belts.
The 24 tooth pulley is made from 7075 alum. so the price is higher than the other blower pulleys.
Racer can pick pulley type and size from drop down menu.