The Chinook Mono Boom is a new model for 2010 with one piece monocoque body design and complete head articulation. The influx of kids to windsurfing inspired Chinook to produce a boom with their requirements. Chinook's special Kid's Boom has a 1" ultra small diameter grip, a range from 120cm to 150cm, and weighs less than 3.5 lbs. Fits smaller diameter masts without a shim. New external locking collars for easy length adjustments.