4 1/2 inch (114mm) Nylon Pulley Wheel used on resistance machines.
Width Inner Hub (ID): 25mm wide
Dimensions Centre Hole: 10mm wide
Groove Depth: Suitable for Wire Cable or Rope from 3mm to 8mm
These pulleys come with plastic spacers on either side of the bearings, if your pulley is going through the frame then these can be removed and the original manufacturer spacers can be used.