... Pa Certification:CCS, ABS, BV CWZ Series Marine Small Sized Cooling Fan Introduction: UGTM CWZ Series Marine Small Sized Axial Fan are suitable for ... and length of the vanes, the ventilations have low-noise, small size, tight-weight, stable performance, etc. In the course of ... explanation: C - W – Z - 200 - D - IIWhere, C = marine W= small-sized Z = axial ventilator 200 = impeller diameter is 200mm D ...