G1-Series 0.40 hp At 0.4hp the G1-Series packs a lot of power in a small package. G2-Series 0.8 hp Perfect for big jobs, the G2-Series performs at an impressive 0.8 hp G3-Series 1.35 hp When the biggest job demands the most power use the G3-Series performing at an impressive 1.35 hp Revolution 0.3 hp The Revolution Series offers a 0.3 hp at a reasonable price for the light industrial applications.