• Harken 57mm Carbo Air Triple Block with Becket and 3-Way U-Lock allows a change of headpost direction
• Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming
• Low-friction Carbo Air blocks are lightweight, strong, reliablend affordable
• Lightweight nylon resin sideplates replace stainless steel straps found in Classic blocks. Densely packed glass fibers reinforce resin for strength
• Good for jib and mainsheet systems on high-performance dinghies, and for high-load control lines on small keelboats