1400 mm of 14 mm diameter tube with a 600 mm tapered section going to 14 x 5 mm at the top. Designed to be the upper section of a mast for a 10 Rater or A Class with 1 metre of 16 mm diameter round tube for the lower section. High fore and aft stiffness in the upper section combined with low windage. This tube has potential for shroudless rigs too.