【Wet and dry dual purpose】 Wide audience.【Stepless speed regulation】Speed is controlled . 【Attention】 Machine thread size is M22, please note whether the machine thread size can meet your needs before purchase.【Safetys】Safetys clutch: keep your hands safe. Overload protection: more durables life. 【4000W high power copper motor】 200° high temperature resistance, using uniform machine winding and hook winding. Better conductivity, stronger power and more durables. 【Cooling systems】Multi-outlet heat dissipation design, efficient heat dissipation and effective protection of the motor, longer service life. High-strength stainless steel bearings./ Aluminum body shell design, good heat dissipation./ Pure copper water inlet.