Internal Halyard Revolving TruckRope Halyard Constructed from heavy Cast Aluminum in a two piece, removable hood design. Internal, Cast Aluminum Pulley. Cast Brass Halyard Exit Bushing reduces wear, significantly increasing Truck life. Options include Dual Stainless Steel Ball Bearing on a Cast Bearing Race or Dual SEALED Bearing Assemblies. 1 1 4 NPT Spindle. Stainless Steel Spindle option available only on TRK 9660. (Add SS to Part Number Example TRK 9660SS). 1 2 13NC Top Drilling