Fan outside diameter: 115mm/4.5"
Pulley outside diameter: 65mm
Pulley height: 20mm
Drive belt size: 9.5mm
Shaft size: 15mm
(These will fit the 18 ACR, but not recommended, as the front bracket is usually flanged to accommodate a 5 inch fan which gives the necessary greater cooling for those units)
OE Numbers: Fan
Lucas: 54202055, 54217652, UZB931
Wood: EC4051
OE Numbers: Pulley
Lucas 54202784, 54202785, UZB908
Wood: EC4050
The fan is anodised (shiny silver colour) and the pulley is painted black.