Masthead Rig Fitting for Spar C

Fits Spar "C" which is 4-1/2" x 3", groove diameter of 3/4". Complete fitting includes double sheaves for internal or external halyards (either wire or rope), pins for forestay and backstay, sheave axles, sheave divider plate, and space for spinnaker halyard block and topping lift pin. Aluminum casting ready for drilling with easy assembly using ordinary tools.