Unifiber Enduro EVO SDM C100 4.00m Constant CurveUnifiber Enduro EVO SDM C100 4. 00m Constant Curve About our Masts Quality. Consistent. Controlled Unifiber masts use the latest Pre Impregnated (Pre Preg) Carbon Moulding Techniques across the board and, unlike many others, even lower (C40) carbon content models benefit from pre preg consistency. For the perfect balance of weight to strength ratio, weight reduction and response, theres simply no better method. The question you should ask is if you