Chinook Pro 1 Carbon Boom 200-260cm 28mm - Proudly made in the USA. Monocoque custom composite body and tail-piece. The NEW 2017 Pro 1 Carbon booms have exceptional strength to weight properties and incredible torsional rigidity. The boom head fits both standard and reduced diameter masts perfectly. New Loop-N-Go outhaul block with rope retention gets you out on the water faster. Straight arm sections combined with more grip area around the compact head make this one of our most popular small carbon boom.