Greenworks G-Max Li-Ion Single-Stage Snow Blower- 20in 40V 4Ah Model#26272Greenworks G-Max Li-Ion Single-Stage Snow Blower- 20in 40V 4Ah Model#26272. Northern Tool Item# 60958. This rechargeable, cordless Greenworks 20in. G-Max Li-Ion Single-Stage Snow Blower features the torque you need to power through snow. The digitally-controlled brushless motor offers quiet operation and long life. Includes G-Max.