The Ultimate Wood Double Hung Magnum window is designed for use in residential, commercial and historic projects where expansive sizes and the natural look of a wood exterior is needed. Features: Available in heights up to 10 feet or widths up to 5 feet; Engineered for smooth operation at every sizes; Multiple exterior woods and finishes available; Also available as a round top, single hung, stationary transom or picture window; Triple hung is available by special order for additional design options; Available with IZ3 coastal/hurrican certification; CE certified.