Dental air compressor AirStar 30. In good used condition. PRICED TO SELL! No warranty. Product Info from Manufacturer: Model Number: AS30 - 2 Compressor Heads - 1 Cylinder - 1 1/2 HP Total100% Oil-free Delivers dental quality compressed air not available with oil lubricated compressors. It protects valuable handpieces from premature failure due to the effects of moist air and build up of residue.Virtually maintenance-free: Oil-free means there is no oil to monitor and change. The AirStar requires only an easy, annual filter change.