This rounded belt fits the Hoover Commercial Guardsman and a few Hoover industrial upright vacuums. 
Examples of Hoover commercial vac models that use this belt includes: 
- Guardsman - C1433010, C1431010 
- Guardsman - C1431, C1431010 
- Guardsman - C1433, C1433010 
- Guardsman - C1631, C1632, C1633, C1634 
- Professional - CH50000, CH50020 
- Heavy Duty - EH50500 
Includes 2 belts replacements. Hoover 044783AG belt will stretch over time and it is recommended that it be changed every 6 month to maintain performance. 
Replacement for Hoover part numbers: 
- 044783AG 
- 40201062 
- AH20075 
- Style AG