... ensure long and safe operation4) Frequency conversion water-cooling large power motor, low noise, even speed5) Humanistic ... spindle motor cooled by water Option: Italian HSD air-cooled Working modestepper Spindel speed 0-24000rpm w ... 30mm Flat Carbide Cuttercollet2pcs3.175mm, 6.0mmclamp8pcs water(air) -cooling pump1unit50w,135wspanner2pcs brush1pcs power cord1pcs USB cable1pcs software1pcsType3 English ...