The Blackgold Power spar set has the same 45 microns black hard anodized mast and the same black anodized sprit as the black gold medium. The 45mm Blackgold Power boom is stiffer to keep more tension on the leech for the heavier sailor. It is suggested for the sailor 80-100lbs. We now have Harken ball bearing halyard blocks and pure Vectran spliced lines. Feature for feature, there is no equal to the Optiparts Blackgold set. All black fittings, hard anodized cleats, a black sprit chafe guard, captive eye straps on the boom, a halyard cleat with a becket. Zero stretch, zero creep black, Vectran line package.