1200mm  length Mast Tracks PRE CUT and  inserted in HD EPS foam - Ready to CNC or Hand shape - Blank is 2450mm Long - 600mm Wide and 150mm Thick. 
HD Foam is Inserted and Glued in with CNC and Tool Friendly Foaming Glue - Excellent strength and Bond. The Lightest way to make a stiff strong mast base and maintain the best stiffness through the board.