Leads external halyards, topping lifts and control line aft from the mast base. White Delrin™ sheaves, for line halyards, contain UV inhibiting additives to protect the sheaves from damaging ultraviolet rays. Carefully designed black aluminum sheaves accommodate both line and wire, providing a smooth surface for line and full support for wire to prevent flattening.
• All these blocks have polished stainless steel mounting flanges
• Cheek material is either black anodized aluminum, or polished stainless steel
• Maximum wire diameter for aluminum sheaves: 3/16"