- Replacement RAMVAC BULLDOG 550 Drive Belt: 
Fits the  RAMVAC BULLDOG  550 Dental Vacuum Unit with the following S/N's
855.0515.11 & # 855.0815.30
 Cogged Belt Length: 26.38"
Size: .63" @ Top x .31" Thick
CROSS REFERENCE NUMBERS:
 RAMVAC  OEM part #  000274SP 
 DCI  OEM part #   2878