***allBoatunderdeckfurlingunitsareidealforsportboatsanddaysailersfrom4.8mto9m(16to30ft).Thedrumislocatedbeneaththedeck,loweringthetackheightformaximizedsailarea.Anoptionalhoistableballbearinghalyardswivelcanbeinstalledonyourheadstaysoyoucanraiseorlowerthesailwithoutremovingtheheadstay.Swivelsareindependentoftheheadstay,allowingyoutotensiontheluffseparatelyfromthemastrake.小型船甲板下收卷装置非常适合4.8m至9m（16至30英尺）的运动船和日间帆船。滚筒位于甲板下方，降低了大头钉高度以化帆面积。可以在您的头枕上安装一个可选的可提升滚珠轴承吊索旋转装置，这样您就可以在不移除头枕的情况下升高或降低帆。转环***于头枕，使您可以将拉夫与桅杆耙分开张紧。)