HS4021 - High Speed Turbine, standard head, triple spray colling system, long life bearings
HS4022 - High Speed Turbine, small head, triple spray colling system, long life bearings
HS4011 - High Speed Turbine, standard head, single spray cooling system, long life bearings
HS4012 - High Speed Turbine, small head, single spray cooling system, long life bearings