The Snap-on Polartek A/C Machine, No. EEAC330, is an entry-level recycling machine. It works on R134a refrigerant and has a 30 lb refillable refrigerant tank. The EEAC330 has a 5" graphic display, side pocket for hose storage and vehicle database. The vacuum pump is 3 cfm, two-stage and on-board oil injection is automatic. Includes a two-year warranty.