Check the listing for details. Dental-Ez RAMVAC Bulldog Filter Kit Vacuum Unit Air Filters QT1 VPK113. Condition: New. Listed at 169.99 USD. Dental-Ez RAMVAC Bulldog Filter Kit Vacuum Unit Air Filters QT1 VPK113 Air filters need to be replace annually! Can be see how replace from here:https://www.youtube.com/watch?v=-56ZnFJc0yM Air Filters Kit Includes: Includes: Filter Element (RPI Part #VPE114), Filter Element (RPI Part #VPE115), Oil Filter Element (RPI Part #VPE116), PM Sticker and PM Checklist. Service Tip: Air filter life depends on vacuum usage, nature of environment, and amount of aspirated material. Inspect air filter every 1,000 hours and replace every 2,000 hours or when visibly dirty. Also, inspect the oil filter every 1,000 hours and change the oil filter element every 2,000 hours or when changing the oil. Bulldog 550 DENTAL-EZ Dental Vacuum Units Bulldog QT1 DENTAL-EZ Dental Vacuum Units Bulldog QT2 DENTAL-EZ Dental Vacuum Units Bulldog QT3 DENTAL-EZ Dental Vacuum Units Brand: RPI Item No: VPK113 Package: Single Kit / Package Same Day Fast Shipping! US SELLER NurisSupply