Harken's low friction Carbo AirBlocks® are lightweight, strong, reliable, and affordable. Companions to the popular Harken Black Magic® line, these small compact blocks have very high working loads for safe, easy trimming no matter how hard the wind blows.
Lightweight sideplates of high strength nylon resin replace stainless steel straps found in Classic blocks. They are UV-stabilized to provide excellent protection against long term exposure to salt water and sun. Carbo blocks are ideal for the small-diameter lines favored by racers.