Seldén Backstay Flicker is a mast or boom service fitting for compatible Seldén spar systems. Backstay flicker – gives the mainsail space to move The backstay flicker is a glass fibre rod fitted to the head box on a fractional rig with swept spreaders. It lifts up a wire or rope backstay to allow for free passage of a. It is intended for replacement, maintenance or completion of the corresponding original spar assembly. Because Seldén has used several mast and boom sections over many years, check the existing component, section profile and fixing dimensions before ordering. Where an article number is shown, use it as the primary identifier and do not assume that a visually similar fitting from another spar section will be interchangeable.