Air Techniques’ STS™ Dry Vacuum system is powerfully efficient, reliable and environmentally responsible. The unit is 100% oil free, uses no water and requires no periodic maintenance. A horizontal motor design saves space and nickel-plated housing and impeller reduces oxidation. Six models accommodate up to 30 simultaneous users. A CleanShield Washout System comes standard with every STS to prevent build up of debris. STS is an ideal dry vacuum system for general dentistry and oral surgery.