Three cast aluminum (as shown in photo) or Nylatron sheaves on bronze bearings allow a gradual 90° turn for easy pulling cable through manhole openings. This 3 Sheave Guide has a pulling radius of 24" (610mm), and it will sit on the manhole edge, suspend in the manhole or fit on the jamb skid. This guide has a 10,000 lb. (44,480 N) cable tension load capacity. The support bar is sold separately, and replacement sheaves are available.