The Bamar BMG 50R twin groove foil sections can be fitted on the C4 model. They are made of durable extruded aluminium alloy and their oval section offers high aerodynamic performance. The connection between two foils sections is made through an aluminium splice piece that is inserted inside the foils to ensure a perfect alignment. Each standard furler set has foil sections included, but these 1.5m long sections can be purchased individually for additional forestay length or as spares / replacements.