Robinair Vacuum Pumps are engineered specifically to meet your A/C maintenance needs and to give you trouble-free operation. Take advantage of our years of experience and know-how developing pumps to help you do your job faster and better. NO HASSLE WARRANTY ? All Robinair Vacuum Pumps are backed by our exclusive ?No Hassle? over-the-counter replacement warranty. You can return a pump to your Robinair distributor, within the first year, for an immediate exchange ? with no hassle! Designed for use on A/C-R systems using CFCs, HCFCs, and HFCs in conjunction with mineral oil, ester oil, alkylbenzene oil and PAG oil as lubricants. Do not use with ammonia or lithium bromide systems; not for use with flammable refrigerants