Comparison : Item # 109-019C, 120 Meter Square (mm?) Fan Size, Nickel-Chrome Plating Surface Treatment, and Outlet Side Type Finger Guard
Item # 109-019E, 120 Meter Square (mm?) Fan Size, Nickel-Chrome Plating Surface Treatment, and Inlet Side, Outlet Side Type Finger Guard
Item # 109-019K, 120 Meter Square (mm?) Fan Size, Cation Electroplating Surface Treatment, and Inlet Side, Outlet Side Type Finger Guard
Item # 109-049C, 80 Meter Square (mm?) Fan Size, Nickel-Chrome Plating Surface Treatment, and Outlet Side Type Finger Guard
Item # 109-049E, 80 Meter Square (mm?) Fan Size, Nickel-Chrome Plating Surface Treatment, and Inlet Side, Outlet Side Type Finger Guard