UNIFIBER Mast ELITE SDM C100 Sizes: 400 / 430 / 460 / 490 Flexes: We stock Constant Curve - if you would like to order Constant FL Curve or Constant FH Curve let us know The Elite C100 SDM masts are the hottest choice for high-end wave and racing sails. The lightning-quick flex of this mast delivers optimum reaction and power control to your rig. For dedicated and serious windsurfers it is the best choice for low weight, high performance, and durable mast. The Elite C100 SDM mast range is introduced in three new specialized curves: Constant Curve (Green) — A 'classic' constant curve. Balanced and versatile, with the curve profile that has been preferred by many sailmakers for decades. Constant FL Curve (Yellow) — A modern-day flex top with a little more flexing in the centre. Constant FH Curve (Red)— Flexes in the top as much as the Green Curve but is a little stiffer in the centre, resulting in a very fluent curve. Quickest reflex response Light weight: reduce swing weight and more control Universal Ferrule System allows for custom mast builds with different tops and bases Three different flexes to fit most of the sail brands SDM models are perfect for race, freerace and freeride sails Does NP use Flex Top? NP used Flex Top curves until 2016. Following years their mast geometry moved shifted closer to the Constant Curve. Our Constant Curve masts are definitely a very good match.