Medium Duty GX Pump
GX Pump CS4
5,800 PSI max · Water + fan cooled
12V120V Auto-stop
Water-cooled, 4-stage, 350W, 5800 PSI. Auto-stop, hour meter, rated for 5 hours continuous. 12V with a 110V converter included.
Compressors / By What It Fills
Compressors That Can Fill Micro Tanks
Tiny bottles and buddy tanks, usually under 20 cubic inches.
4 compressors
Narrow it down further → Medium Duty 
Medium Duty GX Pump
GX Pump CS4-I
5,800 PSI max · Water + fan cooled
12V120V Auto-stop
The CS4 with the 110V converter built in. Water-cooled, 4-stage, 350W, 5800 PSI, auto-stop, 5 hours continuous. Roger's champion pick.
Medium Duty GX Pump
GX Pump 5K1
5,800 PSI max · Water + fan cooled
120V Auto-stop
The single-piston 5K2. 4-stage, 900W, 5800 PSI, auto-stop, 10 hours continuous. Sold direct by GX.
Medium Duty GX Pump
GX Pump 5K2
5,800 PSI max · Water + fan cooled
120V Auto-stop
Dual-piston, 4-stage, 1200W, 5800 PSI. Fills a 6.8L tank in about 45 minutes. Rated for 10 hours continuous. Sold direct by GX.