The Mast Step Plug is made from Delrin and fits onto the bottom of the lower section of the Optimist Mast. This is the low-friction version of the standard Heel Plug, which is suitable for racing and school masts.When refitting an old mast with a high heel plug, ensure the total mast length does not exceed 2350 mm.Available at Sailcenter.SpecificationWeight (kg): 0,062